From 826addb4c11f6a02a17c59b145e2fe782ea759a8 Mon Sep 17 00:00:00 2001
From: Michael Mayer <michael@photoprism.app>
Date: Fri, 10 Feb 2023 15:53:01 +0100
Subject: [PATCH] PWA: Create manifest.json in code without using a template
 #3181

Signed-off-by: Michael Mayer <michael@photoprism.app>
---
 assets/templates/manifest.json           |  98 --------------------
 frontend/src/common/api.js               |   2 +-
 frontend/tests/unit/config.js            |   2 +-
 internal/config/client_assets.go         |   4 +-
 internal/config/client_assets_test.go    |   6 +-
 internal/config/client_config.go         |   4 +
 internal/config/config.go                |   1 +
 internal/config/config_app.go            | 105 ++++++++++++++++++++++
 internal/config/config_app_test.go       | 109 +++++++++++++++++++++++
 internal/config/config_cache.go          |  18 ++++
 internal/config/config_customize.go      |  55 ------------
 internal/config/config_customize_test.go |  47 ----------
 internal/config/flags.go                 |  20 +++--
 internal/config/options.go               |   3 +-
 internal/config/report.go                |   3 +-
 internal/pwa/categories.go               |   8 ++
 internal/pwa/config.go                   |  12 +++
 internal/pwa/icon.go                     |  43 +++++++++
 internal/pwa/icon_test.go                |  24 +++++
 internal/pwa/manifest.go                 |  45 ++++++++++
 internal/pwa/manifest_test.go            |  32 +++++++
 internal/pwa/permissions.go              |   8 ++
 internal/pwa/pwa.go                      |  25 ++++++
 internal/pwa/sw.go                       |   8 ++
 internal/server/routes.go                |   3 +
 internal/server/routes_pwa.go            |  42 +++++++++
 internal/server/routes_sharing.go        |   2 +-
 internal/server/routes_static.go         |  31 -------
 internal/server/routes_test.go           |  69 ++++++++++----
 pkg/clean/color.go                       |  25 ++++++
 pkg/clean/color_test.go                  |  31 +++++++
 31 files changed, 618 insertions(+), 267 deletions(-)
 delete mode 100644 assets/templates/manifest.json
 create mode 100644 internal/config/config_app.go
 create mode 100644 internal/config/config_app_test.go
 create mode 100644 internal/config/config_cache.go
 create mode 100644 internal/pwa/categories.go
 create mode 100644 internal/pwa/config.go
 create mode 100644 internal/pwa/icon.go
 create mode 100644 internal/pwa/icon_test.go
 create mode 100644 internal/pwa/manifest.go
 create mode 100644 internal/pwa/manifest_test.go
 create mode 100644 internal/pwa/permissions.go
 create mode 100644 internal/pwa/pwa.go
 create mode 100644 internal/pwa/sw.go
 create mode 100644 internal/server/routes_pwa.go
 create mode 100644 pkg/clean/color.go
 create mode 100644 pkg/clean/color_test.go

diff --git a/assets/templates/manifest.json b/assets/templates/manifest.json
deleted file mode 100644
index 9813a4cce..000000000
--- a/assets/templates/manifest.json
+++ /dev/null
@@ -1,98 +0,0 @@
-{
-  "name": "{{ .config.AppName }}",
-  "categories": ["photo"],
-  "short_name": "{{ printf "%.32s" .config.AppName }}",
-  "description": "{{ .config.SiteDescription }}",
-  "icons": [
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/16.png",
-      "sizes": "16x16",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/32.png",
-      "sizes": "32x32",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/72.png",
-      "sizes": "72x72",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/114.png",
-      "sizes": "114x114",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/128.png",
-      "sizes": "128x128",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/144.png",
-      "sizes": "144x144",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/152.png",
-      "sizes": "152x152",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/160.png",
-      "sizes": "160x160",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/167.png",
-      "sizes": "167x167",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/180.png",
-      "sizes": "180x180",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/192.png",
-      "sizes": "192x192",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/196.png",
-      "sizes": "196x196",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/256.png",
-      "sizes": "256x256",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/400.png",
-      "sizes": "400x400",
-      "type": "image/png"
-    },
-    {
-      "src": "{{ .config.StaticUri }}/icons/{{ .config.AppIcon }}/512.png",
-      "sizes": "512x512",
-      "type": "image/png"
-    }
-  ],
-  "scope": "{{ .config.BaseUri }}/",
-  "start_url": "{{ .config.BaseUri }}/library/",
-  "serviceworker": {
-    "src": "sw.js",
-    "scope": "{{ .config.BaseUri }}/",
-    "use_cache": true
-  },
-  "display": "{{ .config.AppMode }}",
-  "theme_color": "#000000",
-  "background_color": "#000000",
-  "permissions": [
-    "geolocation",
-    "downloads",
-    "storage"
-  ]
-}
diff --git a/frontend/src/common/api.js b/frontend/src/common/api.js
index b8fda8b16..145aea366 100644
--- a/frontend/src/common/api.js
+++ b/frontend/src/common/api.js
@@ -38,7 +38,7 @@ const testConfig = {
   downloadToken: "public",
   cssUri: "/static/build/app.2259c0edcc020e7af593.css",
   jsUri: "/static/build/app.9bd7132eaee8e4c7c7e3.js",
-  manifestUri: "/manifest.json?0e41a7e5",
+  manifestUri: "/manifest.json",
 };
 
 const c = window.__CONFIG__ ? window.__CONFIG__ : testConfig;
diff --git a/frontend/tests/unit/config.js b/frontend/tests/unit/config.js
index ee7bb6062..692358c51 100644
--- a/frontend/tests/unit/config.js
+++ b/frontend/tests/unit/config.js
@@ -287,7 +287,7 @@ const clientConfig = {
   previewToken: "public",
   cssUri: "/static/build/app.2259c0edcc020e7af593.css",
   jsUri: "/static/build/app.9bd7132eaee8e4c7c7e3.js",
-  manifestUri: "/manifest.json?0e41a7e5",
+  manifestUri: "/manifest.json",
   settings: {
     ui: {
       scrollbar: true,
diff --git a/internal/config/client_assets.go b/internal/config/client_assets.go
index fc0c6c193..e66f6ce30 100644
--- a/internal/config/client_assets.go
+++ b/internal/config/client_assets.go
@@ -5,8 +5,6 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
-
-	"github.com/photoprism/photoprism/pkg/fs"
 )
 
 type ClientAssets struct {
@@ -87,5 +85,5 @@ func (c *Config) ClientAssets() ClientAssets {
 
 // ClientManifestUri returns the frontend manifest.json URI.
 func (c *Config) ClientManifestUri() string {
-	return fmt.Sprintf("%s?%d", c.BaseUri("/manifest.json"), fs.BirthTime(c.TemplatesPath()+"/manifest.json").Unix())
+	return c.BaseUri("/manifest.json")
 }
diff --git a/internal/config/client_assets_test.go b/internal/config/client_assets_test.go
index b1e235271..6877fc80b 100644
--- a/internal/config/client_assets_test.go
+++ b/internal/config/client_assets_test.go
@@ -85,13 +85,13 @@ func TestConfig_ClientAssets(t *testing.T) {
 func TestClientManifestUri(t *testing.T) {
 	c := NewConfig(CliTestContext())
 
-	assert.True(t, strings.HasPrefix(c.ClientManifestUri(), "/manifest.json?"))
+	assert.True(t, strings.HasPrefix(c.ClientManifestUri(), "/manifest.json"))
 
 	c.options.SiteUrl = ""
 
-	assert.True(t, strings.HasPrefix(c.ClientManifestUri(), "/manifest.json?"))
+	assert.True(t, strings.HasPrefix(c.ClientManifestUri(), "/manifest.json"))
 
 	c.options.SiteUrl = "http://myhost/foo"
 
-	assert.True(t, strings.HasPrefix(c.ClientManifestUri(), "/foo/manifest.json?"))
+	assert.True(t, strings.HasPrefix(c.ClientManifestUri(), "/foo/manifest.json"))
 }
diff --git a/internal/config/client_config.go b/internal/config/client_config.go
index ba4a4638d..0726f99cb 100644
--- a/internal/config/client_config.go
+++ b/internal/config/client_config.go
@@ -50,6 +50,7 @@ type ClientConfig struct {
 	AppName          string              `json:"appName"`
 	AppMode          string              `json:"appMode"`
 	AppIcon          string              `json:"appIcon"`
+	AppColor         string              `json:"appColor"`
 	Debug            bool                `json:"debug"`
 	Trace            bool                `json:"trace"`
 	Test             bool                `json:"test"`
@@ -253,6 +254,7 @@ func (c *Config) ClientPublic() ClientConfig {
 		AppName:          c.AppName(),
 		AppMode:          c.AppMode(),
 		AppIcon:          c.AppIcon(),
+		AppColor:         c.AppColor(),
 		WallpaperUri:     c.WallpaperUri(),
 		Version:          c.Version(),
 		Copyright:        c.Copyright(),
@@ -332,6 +334,7 @@ func (c *Config) ClientShare() ClientConfig {
 		AppName:          c.AppName(),
 		AppMode:          c.AppMode(),
 		AppIcon:          c.AppIcon(),
+		AppColor:         c.AppColor(),
 		WallpaperUri:     c.WallpaperUri(),
 		Version:          c.Version(),
 		Copyright:        c.Copyright(),
@@ -418,6 +421,7 @@ func (c *Config) ClientUser(withSettings bool) ClientConfig {
 		AppName:          c.AppName(),
 		AppMode:          c.AppMode(),
 		AppIcon:          c.AppIcon(),
+		AppColor:         c.AppColor(),
 		WallpaperUri:     c.WallpaperUri(),
 		Version:          c.Version(),
 		Copyright:        c.Copyright(),
diff --git a/internal/config/config.go b/internal/config/config.go
index 69b853d44..70b76d52b 100644
--- a/internal/config/config.go
+++ b/internal/config/config.go
@@ -155,6 +155,7 @@ func (c *Config) Options() *Options {
 
 // Propagate updates config options in other packages as needed.
 func (c *Config) Propagate() {
+	FlushCache()
 	log.SetLevel(c.LogLevel())
 
 	// Set thumbnail generation parameters.
diff --git a/internal/config/config_app.go b/internal/config/config_app.go
new file mode 100644
index 000000000..4fbea5f57
--- /dev/null
+++ b/internal/config/config_app.go
@@ -0,0 +1,105 @@
+package config
+
+import (
+	"path/filepath"
+	"strings"
+
+	"github.com/photoprism/photoprism/internal/pwa"
+	"github.com/photoprism/photoprism/pkg/clean"
+	"github.com/photoprism/photoprism/pkg/fs"
+	"github.com/photoprism/photoprism/pkg/txt"
+)
+
+// AppName returns the app name when installed on a device.
+func (c *Config) AppName() string {
+	name := strings.TrimSpace(c.options.AppName)
+
+	if c.NoSponsor() || name == "" {
+		name = c.SiteTitle()
+	}
+
+	name = strings.Map(func(r rune) rune {
+		switch r {
+		case '\'', '"':
+			return -1
+		}
+
+		return r
+	}, name)
+
+	return txt.Clip(name, 32)
+}
+
+// AppMode returns the app mode when installed on a device.
+func (c *Config) AppMode() string {
+	switch c.options.AppMode {
+	case "fullscreen", "standalone", "minimal-ui", "browser":
+		return c.options.AppMode
+	default:
+		return "standalone"
+	}
+}
+
+// AppIcon returns the app icon when installed on a device.
+func (c *Config) AppIcon() string {
+	defaultIcon := "logo"
+
+	if c.NoSponsor() || c.options.AppIcon == "" || c.options.AppIcon == defaultIcon {
+		// Default.
+	} else if strings.Contains(c.options.AppIcon, "/") {
+		return c.options.AppIcon
+	} else if fs.FileExists(c.AppIconsPath(c.options.AppIcon, "16.png")) {
+		return c.options.AppIcon
+	}
+
+	return defaultIcon
+}
+
+// AppColor returns the app splash screen color when installed on a device.
+func (c *Config) AppColor() string {
+	if appColor := clean.Color(c.options.AppColor); appColor == "" {
+		return "#000000"
+	} else {
+		return appColor
+	}
+}
+
+// AppIconsPath returns the path to the app icons.
+func (c *Config) AppIconsPath(name ...string) string {
+	if len(name) > 0 {
+		filePath := []string{c.StaticPath(), "icons"}
+		filePath = append(filePath, name...)
+		return filepath.Join(filePath...)
+	}
+
+	return filepath.Join(c.StaticPath(), "icons")
+}
+
+// AppConfig returns the progressive web app config.
+func (c *Config) AppConfig() pwa.Config {
+	return pwa.Config{
+		Icon:        c.AppIcon(),
+		Color:       c.AppColor(),
+		Name:        c.AppName(),
+		Description: c.SiteDescription(),
+		Mode:        c.AppMode(),
+		BaseUri:     c.BaseUri("/"),
+		StaticUri:   c.StaticUri(),
+	}
+}
+
+// AppManifest returns the progressive web app manifest.
+func (c *Config) AppManifest() *pwa.Manifest {
+	if cacheData, ok := Cache.Get(CacheKeyAppManifest); ok {
+		log.Tracef("config: cache hit for %s", CacheKeyAppManifest)
+
+		return cacheData.(*pwa.Manifest)
+	}
+	result := pwa.NewManifest(c.AppConfig())
+	if result != nil {
+		Cache.SetDefault(CacheKeyAppManifest, result)
+	} else {
+		log.Warnf("config: web app manifest is nil - possible bug")
+	}
+	return result
+}
diff --git a/internal/config/config_app_test.go b/internal/config/config_app_test.go
new file mode 100644
index 000000000..d14618558
--- /dev/null
+++ b/internal/config/config_app_test.go
@@ -0,0 +1,109 @@
+package config
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/photoprism/photoprism/internal/pwa"
+)
+
+func TestConfig_AppName(t *testing.T) {
+	c := NewConfig(CliTestContext())
+
+	assert.Equal(t, "PhotoPrism", c.AppName())
+}
+
+func TestConfig_AppMode(t *testing.T) {
+	c := NewConfig(CliTestContext())
+
+	assert.Equal(t, "standalone", c.AppMode())
+}
+
+func TestConfig_AppIcon(t *testing.T) {
+	c := NewConfig(CliTestContext())
+
+	assert.Equal(t, "logo", c.AppIcon())
+	c.options.AppIcon = "foo"
+	assert.Equal(t, "logo", c.AppIcon())
+	c.options.AppIcon = "app"
+	assert.Equal(t, "app", c.AppIcon())
+	c.options.AppIcon = "crisp"
+	assert.Equal(t, "crisp", c.AppIcon())
+	c.options.AppIcon = "mint"
+	assert.Equal(t, "mint", c.AppIcon())
+	c.options.AppIcon = "bold"
+	assert.Equal(t, "bold", c.AppIcon())
+	c.options.AppIcon = "logo"
+	assert.Equal(t, "logo", c.AppIcon())
+}
+
+func TestConfig_AppColor(t *testing.T) {
+	c := NewConfig(CliTestContext())
+
+	assert.Equal(t, "#000000", c.AppColor())
+	c.options.AppColor = "#aBC123"
+	assert.Equal(t, "#abc123", c.AppColor())
+	c.options.AppColor = ""
+	assert.Equal(t, "#000000", c.AppColor())
+}
+
+func TestConfig_AppIconsPath(t *testing.T) {
+	c := NewConfig(CliTestContext())
+
+	if p := c.AppIconsPath(); !strings.HasSuffix(p, "photoprism/assets/static/icons") {
+		t.Fatal("path .../photoprism/assets/static/icons expected")
+	}
+
+	if p := c.AppIconsPath("app"); !strings.HasSuffix(p, "photoprism/assets/static/icons/app") {
+		t.Fatal("path .../photoprism/assets/static/icons/app expected")
+	}
+
+	if p := c.AppIconsPath("app", "512.png"); !strings.HasSuffix(p, "photoprism/assets/static/icons/app/512.png") {
+		t.Fatal("path .../photoprism/assets/static/icons/app/512.png expected")
+	}
+}
+
+func TestConfig_AppConfig(t *testing.T) {
+	c := NewConfig(CliTestContext())
+
+	result := c.AppConfig()
+	assert.NotEmpty(t, result)
+	assert.Equal(t, c.AppName(), result.Name)
+	assert.Equal(t, c.AppIcon(), result.Icon)
+	assert.Equal(t, c.SiteDescription(), result.Description)
+	assert.Equal(t, c.BaseUri("/"), result.BaseUri)
+	assert.Equal(t, c.StaticUri(), result.StaticUri)
+}
+
+func TestConfig_AppManifest(t *testing.T) {
+	c := NewConfig(CliTestContext())
+
+	appConf := c.AppConfig()
+	assert.NotEmpty(t, appConf)
+
+	t.Run("Cached", func(t *testing.T) {
+		result := c.AppManifest()
+		assert.NotEmpty(t, result)
+		assert.Equal(t, appConf.Name, result.Name)
+		assert.Equal(t, appConf.Name, result.ShortName)
+		assert.Equal(t, appConf.Description, result.Description)
+		assert.Equal(t, appConf.BaseUri, result.Scope)
+		assert.Equal(t, appConf.BaseUri+"library/", result.StartUrl)
+		assert.Len(t, result.Icons, len(pwa.IconSizes))
+		assert.Len(t, result.Categories, len(pwa.Categories))
+		assert.Len(t, result.Permissions, len(pwa.Permissions))
+
+		cached := c.AppManifest()
+		assert.NotEmpty(t, cached)
+		assert.Equal(t, appConf.Name, cached.Name)
+		assert.Equal(t, appConf.Name, cached.ShortName)
+		assert.Equal(t, appConf.Description, cached.Description)
+		assert.Equal(t, appConf.BaseUri, cached.Scope)
+		assert.Equal(t, appConf.BaseUri+"library/", cached.StartUrl)
+		assert.Len(t, cached.Icons, len(pwa.IconSizes))
+		assert.Len(t, cached.Categories, len(pwa.Categories))
+		assert.Len(t, cached.Permissions, len(pwa.Permissions))
+	})
+}
diff --git a/internal/config/config_cache.go b/internal/config/config_cache.go
new file mode 100644
index 000000000..ff68fa29a
--- /dev/null
+++ b/internal/config/config_cache.go
@@ -0,0 +1,18 @@
+package config
+
+import (
+	"time"
+
+	gc "github.com/patrickmn/go-cache"
+)
+
+var Cache = gc.New(time.Hour, 15*time.Minute)
+
+const (
+	CacheKeyAppManifest = "app-manifest"
+)
+
+// FlushCache clears the config cache.
+func FlushCache() {
+	Cache.Flush()
+}
diff --git a/internal/config/config_customize.go b/internal/config/config_customize.go
index 5788edb1c..daab6c961 100644
--- a/internal/config/config_customize.go
+++ b/internal/config/config_customize.go
@@ -8,7 +8,6 @@ import (
 	"github.com/photoprism/photoprism/internal/i18n"
 	"github.com/photoprism/photoprism/pkg/clean"
 	"github.com/photoprism/photoprism/pkg/fs"
-	"github.com/photoprism/photoprism/pkg/txt"
 )
 
 // DefaultTheme returns the default user interface theme name.
@@ -29,60 +28,6 @@ func (c *Config) DefaultLocale() string {
 	return c.options.DefaultLocale
 }
 
-// AppIcon returns the app icon when installed on a device.
-func (c *Config) AppIcon() string {
-	defaultIcon := "logo"
-
-	if c.NoSponsor() || c.options.AppIcon == "" || c.options.AppIcon == defaultIcon {
-		// Default.
-	} else if fs.FileExists(c.AppIconsPath(c.options.AppIcon, "512.png")) {
-		return c.options.AppIcon
-	}
-
-	return defaultIcon
-}
-
-// AppIconsPath returns the path to the app icons.
-func (c *Config) AppIconsPath(name ...string) string {
-	if len(name) > 0 {
-		filePath := []string{c.StaticPath(), "icons"}
-		filePath = append(filePath, name...)
-		return filepath.Join(filePath...)
-	}
-
-	return filepath.Join(c.StaticPath(), "icons")
-}
-
-// AppName returns the app name when installed on a device.
-func (c *Config) AppName() string {
-	name := strings.TrimSpace(c.options.AppName)
-
-	if c.NoSponsor() || name == "" {
-		name = c.SiteTitle()
-	}
-
-	name = strings.Map(func(r rune) rune {
-		switch r {
-		case '\'', '"':
-			return -1
-		}
-
-		return r
-	}, name)
-
-	return txt.Clip(name, 32)
-}
-
-// AppMode returns the app mode when installed on a device.
-func (c *Config) AppMode() string {
-	switch c.options.AppMode {
-	case "fullscreen", "standalone", "minimal-ui", "browser":
-		return c.options.AppMode
-	default:
-		return "standalone"
-	}
-}
-
 // WallpaperUri returns the login screen background image `URI`.
 func (c *Config) WallpaperUri() string {
 	if c.NoSponsor() {
diff --git a/internal/config/config_customize_test.go b/internal/config/config_customize_test.go
index fbe79420d..5eccdb550 100644
--- a/internal/config/config_customize_test.go
+++ b/internal/config/config_customize_test.go
@@ -1,7 +1,6 @@
 package config
 
 import (
-	"strings"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
@@ -41,52 +40,6 @@ func TestConfig_DefaultLocale(t *testing.T) {
 	assert.Equal(t, "en", c.DefaultLocale())
 }
 
-func TestConfig_AppIcon(t *testing.T) {
-	c := NewConfig(CliTestContext())
-
-	assert.Equal(t, "logo", c.AppIcon())
-	c.options.AppIcon = "foo"
-	assert.Equal(t, "logo", c.AppIcon())
-	c.options.AppIcon = "app"
-	assert.Equal(t, "app", c.AppIcon())
-	c.options.AppIcon = "crisp"
-	assert.Equal(t, "crisp", c.AppIcon())
-	c.options.AppIcon = "mint"
-	assert.Equal(t, "mint", c.AppIcon())
-	c.options.AppIcon = "bold"
-	assert.Equal(t, "bold", c.AppIcon())
-	c.options.AppIcon = "logo"
-	assert.Equal(t, "logo", c.AppIcon())
-}
-
-func TestConfig_AppIconsPath(t *testing.T) {
-	c := NewConfig(CliTestContext())
-
-	if p := c.AppIconsPath(); !strings.HasSuffix(p, "photoprism/assets/static/icons") {
-		t.Fatal("path .../photoprism/assets/static/icons expected")
-	}
-
-	if p := c.AppIconsPath("app"); !strings.HasSuffix(p, "photoprism/assets/static/icons/app") {
-		t.Fatal("path .../pphotoprism/assets/static/icons/app expected")
-	}
-
-	if p := c.AppIconsPath("app", "512.png"); !strings.HasSuffix(p, "photoprism/assets/static/icons/app/512.png") {
-		t.Fatal("path .../photoprism/assets/static/icons/app/512.png expected")
-	}
-}
-
-func TestConfig_AppName(t *testing.T) {
-	c := NewConfig(CliTestContext())
-
-	assert.Equal(t, "PhotoPrism", c.AppName())
-}
-
-func TestConfig_AppMode(t *testing.T) {
-	c := NewConfig(CliTestContext())
-
-	assert.Equal(t, "standalone", c.AppMode())
-}
-
 func TestConfig_WallpaperUri(t *testing.T) {
 	c := NewConfig(CliTestContext())
 
diff --git a/internal/config/flags.go b/internal/config/flags.go
index f4982b243..3f2462ef4 100644
--- a/internal/config/flags.go
+++ b/internal/config/flags.go
@@ -311,6 +311,13 @@ var Flags = CliFlags{
 			EnvVar: "PHOTOPRISM_DEFAULT_THEME",
 		},
 		Tags: []string{EnvSponsor}}, {
+		Flag: cli.StringFlag{
+			Name:   "app-name",
+			Usage:  "progressive web app `NAME` when installed on a device",
+			Value:  "",
+			EnvVar: "PHOTOPRISM_APP_NAME",
+		},
+		Tags: []string{EnvSponsor}}, {
 		Flag: cli.StringFlag{
 			Name:   "app-mode",
 			Usage:  "progressive web app `MODE` (fullscreen, standalone, minimal-ui, browser)",
@@ -319,17 +326,16 @@ var Flags = CliFlags{
 		}}, {
 		Flag: cli.StringFlag{
 			Name:   "app-icon",
-			Usage:  "progressive web app `ICON` (logo, app, crisp, mint, bold)",
+			Usage:  "home screen `ICON` (logo, app, crisp, mint, bold)",
 			EnvVar: "PHOTOPRISM_APP_ICON",
 		},
 		Tags: []string{EnvSponsor}}, {
 		Flag: cli.StringFlag{
-			Name:   "app-name",
-			Usage:  "progressive web app `NAME` when installed on a device",
-			Value:  "",
-			EnvVar: "PHOTOPRISM_APP_NAME",
-		},
-		Tags: []string{EnvSponsor}}, {
+			Name:   "app-color",
+			Usage:  "splash screen `COLOR` code",
+			EnvVar: "PHOTOPRISM_APP_COLOR",
+			Value:  "#000000",
+		}}, {
 		Flag: cli.StringFlag{
 			Name:   "imprint",
 			Usage:  "legal information `TEXT`, displayed in the page footer",
diff --git a/internal/config/options.go b/internal/config/options.go
index 397dd6f97..4b039ea92 100644
--- a/internal/config/options.go
+++ b/internal/config/options.go
@@ -81,9 +81,10 @@ type Options struct {
 	UploadNSFW            bool          `yaml:"UploadNSFW" json:"-" flag:"upload-nsfw"`
 	DefaultTheme          string        `yaml:"DefaultTheme" json:"DefaultTheme" flag:"default-theme"`
 	DefaultLocale         string        `yaml:"DefaultLocale" json:"DefaultLocale" flag:"default-locale"`
-	AppIcon               string        `yaml:"AppIcon" json:"AppIcon" flag:"app-icon"`
 	AppName               string        `yaml:"AppName" json:"AppName" flag:"app-name"`
 	AppMode               string        `yaml:"AppMode" json:"AppMode" flag:"app-mode"`
+	AppIcon               string        `yaml:"AppIcon" json:"AppIcon" flag:"app-icon"`
+	AppColor              string        `yaml:"AppColor" json:"AppColor" flag:"app-color"`
 	LegalInfo             string        `yaml:"LegalInfo" json:"LegalInfo" flag:"legal-info"`
 	LegalUrl              string        `yaml:"LegalUrl" json:"LegalUrl" flag:"legal-url"`
 	WallpaperUri          string        `yaml:"WallpaperUri" json:"WallpaperUri" flag:"wallpaper-uri"`
diff --git a/internal/config/report.go b/internal/config/report.go
index 5fa65816c..b447891bd 100644
--- a/internal/config/report.go
+++ b/internal/config/report.go
@@ -112,9 +112,10 @@ func (c *Config) Report() (rows [][]string, cols []string) {
 		// Customization.
 		{"default-locale", c.DefaultLocale()},
 		{"default-theme", c.DefaultTheme()},
-		{"app-icon", c.AppIcon()},
 		{"app-name", c.AppName()},
 		{"app-mode", c.AppMode()},
+		{"app-icon", c.AppIcon()},
+		{"app-color", c.AppColor()},
 		{"legal-info", c.LegalInfo()},
 		{"legal-url", c.LegalUrl()},
 		{"wallpaper-uri", c.WallpaperUri()},
diff --git a/internal/pwa/categories.go b/internal/pwa/categories.go
new file mode 100644
index 000000000..35e9a7e94
--- /dev/null
+++ b/internal/pwa/categories.go
@@ -0,0 +1,8 @@
+package pwa
+
+import (
+	"github.com/photoprism/photoprism/pkg/list"
+)
+
+// Categories specifies the default web app manifest categories.
+var Categories = list.List{"photo"}
diff --git a/internal/pwa/config.go b/internal/pwa/config.go
new file mode 100644
index 000000000..ccd645b63
--- /dev/null
+++ b/internal/pwa/config.go
@@ -0,0 +1,12 @@
+package pwa
+
+// Config represents progressive web app manifest config values.
+type Config struct {
+	Icon        string `json:"icon"`
+	Color       string `json:"color"`
+	Name        string `json:"name"`
+	Description string `json:"description"`
+	Mode        string `json:"mode"`
+	BaseUri     string `json:"baseUri"`
+	StaticUri   string `json:"staticUri"`
+}
diff --git a/internal/pwa/icon.go b/internal/pwa/icon.go
new file mode 100644
index 000000000..bd6701e06
--- /dev/null
+++ b/internal/pwa/icon.go
@@ -0,0 +1,43 @@
+package pwa
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Icons represents a list of app icons.
+type Icons []Icon
+
+// Icon represents an app icon.
+type Icon struct {
+	Src   string `json:"src"`
+	Sizes string `json:"sizes,omitempty"`
+	Type  string `json:"type,omitempty"`
+}
+
+// IconSizes represents standard app icon sizes.
+var IconSizes = []int{16, 32, 77, 114, 128, 144, 152, 160, 167, 180, 192, 196, 256, 400, 512}
+
+// NewIcons creates new app icons in the default sizes based on the parameters provided.
+func NewIcons(staticUri, appIcon string) Icons {
+	if appIcon == "" {
+		appIcon = "logo"
+	} else if strings.Contains(appIcon, "/") {
+		return Icons{{
+			Src:  appIcon,
+			Type: "image/png",
+		}}
+	}
+
+	icons := make(Icons, len(IconSizes))
+
+	for i, d := range IconSizes {
+		icons[i] = Icon{
+			Src:   fmt.Sprintf("%s/icons/%s/%d.png", staticUri, appIcon, d),
+			Sizes: fmt.Sprintf("%dx%d", d, d),
+			Type:  "image/png",
+		}
+	}
+
+	return icons
+}
diff --git a/internal/pwa/icon_test.go b/internal/pwa/icon_test.go
new file mode 100644
index 000000000..8984cfcf8
--- /dev/null
+++ b/internal/pwa/icon_test.go
@@ -0,0 +1,24 @@
+package pwa
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewIcons(t *testing.T) {
+	t.Run("Standard", func(t *testing.T) {
+		result := NewIcons("https://demo-cdn.photoprism.app/static", "test")
+		assert.NotEmpty(t, result)
+		assert.Equal(t, "https://demo-cdn.photoprism.app/static/icons/test/16.png", result[0].Src)
+		assert.Equal(t, "image/png", result[0].Type)
+		assert.Equal(t, "16x16", result[0].Sizes)
+	})
+	t.Run("Custom", func(t *testing.T) {
+		result := NewIcons("https://demo-cdn.photoprism.app/static", "/test.png")
+		assert.NotEmpty(t, result)
+		assert.Equal(t, "/test.png", result[0].Src)
+		assert.Equal(t, "image/png", result[0].Type)
+		assert.Equal(t, "", result[0].Sizes)
+	})
+}
diff --git a/internal/pwa/manifest.go b/internal/pwa/manifest.go
new file mode 100644
index 000000000..4b270f807
--- /dev/null
+++ b/internal/pwa/manifest.go
@@ -0,0 +1,45 @@
+package pwa
+
+import (
+	"github.com/photoprism/photoprism/pkg/clean"
+	"github.com/photoprism/photoprism/pkg/list"
+	"github.com/photoprism/photoprism/pkg/txt"
+)
+
+// Manifest represents a progressive web app manifest.
+type Manifest struct {
+	Name            string        `json:"name"`
+	ShortName       string        `json:"short_name,omitempty"`
+	Description     string        `json:"description,omitempty"`
+	Categories      list.List     `json:"categories"`
+	Display         string        `json:"display"`
+	ThemeColor      string        `json:"theme_color"`
+	BackgroundColor string        `json:"background_color"`
+	Scope           string        `json:"scope"`
+	StartUrl        string        `json:"start_url,omitempty"`
+	Serviceworker   Serviceworker `json:"serviceworker,omitempty"`
+	Permissions     list.List     `json:"permissions"`
+	Icons           Icons         `json:"icons"`
+}
+
+// NewManifest creates a new progressive web app manifest based on the config provided.
+func NewManifest(c Config) (m *Manifest) {
+	return &Manifest{
+		Name:            c.Name,
+		ShortName:       txt.Clip(c.Name, 32),
+		Description:     c.Description,
+		Categories:      Categories,
+		Display:         c.Mode,
+		ThemeColor:      clean.Color(c.Color),
+		BackgroundColor: clean.Color(c.Color),
+		Scope:           c.BaseUri,
+		StartUrl:        c.BaseUri + "library/",
+		Serviceworker: Serviceworker{
+			Src:      "sw.js",
+			Scope:    c.BaseUri,
+			UseCache: true,
+		},
+		Permissions: Permissions,
+		Icons:       NewIcons(c.StaticUri, c.Icon),
+	}
+}
diff --git a/internal/pwa/manifest_test.go b/internal/pwa/manifest_test.go
new file mode 100644
index 000000000..76b178c09
--- /dev/null
+++ b/internal/pwa/manifest_test.go
@@ -0,0 +1,32 @@
+package pwa
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestNewManifest(t *testing.T) {
+	c := Config{
+		Icon:        "logo",
+		Color:       "#aaaaaa",
+		Name:        "TestPrism+",
+		Description: "App's Description",
+		Mode:        "fullscreen",
+		BaseUri:     "/",
+		StaticUri:   "/static",
+	}
+
+	t.Run("Standard", func(t *testing.T) {
+		result := NewManifest(c)
+		assert.NotEmpty(t, result)
+		assert.Equal(t, c.Name, result.Name)
+		assert.Equal(t, c.Name, result.ShortName)
+		assert.Equal(t, c.Description, result.Description)
+		assert.Equal(t, c.BaseUri, result.Scope)
+		assert.Equal(t, c.BaseUri+"library/", result.StartUrl)
+		assert.Len(t, result.Icons, len(IconSizes))
+		assert.Len(t, result.Categories, len(Categories))
+		assert.Len(t, result.Permissions, len(Permissions))
+	})
+}
diff --git a/internal/pwa/permissions.go b/internal/pwa/permissions.go
new file mode 100644
index 000000000..058fddab4
--- /dev/null
+++ b/internal/pwa/permissions.go
@@ -0,0 +1,8 @@
+package pwa
+
+import (
+	"github.com/photoprism/photoprism/pkg/list"
+)
+
+// Permissions specifies the default web app manifest permissions.
+var Permissions = list.List{"geolocation", "downloads", "storage"}
diff --git a/internal/pwa/pwa.go b/internal/pwa/pwa.go
new file mode 100644
index 000000000..8f64ab292
--- /dev/null
+++ b/internal/pwa/pwa.go
@@ -0,0 +1,25 @@
+/*
+Package pwa provides data structures and tools for working with progressive web applications.
+
+Copyright (c) 2018 - 2023 PhotoPrism UG. All rights reserved.
+
+	This program is free software: you can redistribute it and/or modify
+	it under Version 3 of the GNU Affero General Public License (the "AGPL"):
+	<https://docs.photoprism.app/license/agpl>
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU Affero General Public License for more details.
+
+	The AGPL is supplemented by our Trademark and Brand Guidelines,
+	which describe how our Brand Assets may be used:
+	<https://www.photoprism.app/trademark>
+
+Feel free to send an email to hello@photoprism.app if you have questions,
+want to support our work, or just want to say hello.
+
+Additional information can be found in our Developer Guide:
+<https://docs.photoprism.app/developer-guide/>
+*/
+package pwa
diff --git a/internal/pwa/sw.go b/internal/pwa/sw.go
new file mode 100644
index 000000000..407383b2f
--- /dev/null
+++ b/internal/pwa/sw.go
@@ -0,0 +1,8 @@
+package pwa
+
+// Serviceworker represents serviceworker options for the PWA manifest.
+type Serviceworker struct {
+	Src      string `json:"src"`
+	Scope    string `json:"scope"`
+	UseCache bool   `json:"use_cache"`
+}
diff --git a/internal/server/routes.go b/internal/server/routes.go
index 6985e20a6..5c72294e4 100644
--- a/internal/server/routes.go
+++ b/internal/server/routes.go
@@ -16,6 +16,9 @@ func registerRoutes(router *gin.Engine, conf *config.Config) {
 	// Static assets and templates.
 	registerStaticRoutes(router, conf)
 
+	// Web app bootstrapping and configuration.
+	registerPWARoutes(router, conf)
+
 	// Built-in WebDAV server.
 	registerWebDAVRoutes(router, conf)
 
diff --git a/internal/server/routes_pwa.go b/internal/server/routes_pwa.go
new file mode 100644
index 000000000..ea02167be
--- /dev/null
+++ b/internal/server/routes_pwa.go
@@ -0,0 +1,42 @@
+package server
+
+import (
+	"net/http"
+	"path/filepath"
+
+	"github.com/gin-gonic/gin"
+
+	"github.com/photoprism/photoprism/internal/config"
+)
+
+// registerPWARoutes configures the progressive web app bootstrap and config routes.
+func registerPWARoutes(router *gin.Engine, conf *config.Config) {
+	// Loads Progressive Web App (PWA) on all routes beginning with "library".
+	pwa := func(c *gin.Context) {
+		values := gin.H{
+			"signUp": gin.H{"message": config.MsgSponsor, "url": config.SignUpURL},
+			"config": conf.ClientPublic(),
+		}
+		c.HTML(http.StatusOK, conf.TemplateName(), values)
+	}
+	router.Any(conf.BaseUri("/library/*path"), pwa)
+
+	// Progressive Web App (PWA) Manifest.
+	manifest := func(c *gin.Context) {
+		c.Header("Cache-Control", "no-store")
+		c.Header("Content-Type", "application/json")
+		c.IndentedJSON(200, conf.AppManifest())
+	}
+	router.Any(conf.BaseUri("/manifest.json"), manifest)
+
+	// Progressive Web App (PWA) Service Worker.
+	swWorker := func(c *gin.Context) {
+		c.Header("Cache-Control", "no-store")
+		c.File(filepath.Join(conf.BuildPath(), "sw.js"))
+	}
+	router.Any("/sw.js", swWorker)
+
+	if swUri := conf.BaseUri("/sw.js"); swUri != "/sw.js" {
+		router.Any(swUri, swWorker)
+	}
+}
diff --git a/internal/server/routes_sharing.go b/internal/server/routes_sharing.go
index 92ce90ece..bd99d5781 100644
--- a/internal/server/routes_sharing.go
+++ b/internal/server/routes_sharing.go
@@ -2,8 +2,8 @@ package server
 
 import (
 	"github.com/gin-gonic/gin"
-	"github.com/photoprism/photoprism/internal/api"
 
+	"github.com/photoprism/photoprism/internal/api"
 	"github.com/photoprism/photoprism/internal/config"
 )
 
diff --git a/internal/server/routes_static.go b/internal/server/routes_static.go
index feaeb68ee..92dc6cdd6 100644
--- a/internal/server/routes_static.go
+++ b/internal/server/routes_static.go
@@ -34,37 +34,6 @@ func registerStaticRoutes(router *gin.Engine, conf *config.Config) {
 		}
 	})
 
-	// Loads Progressive Web App (PWA) on all routes beginning with "library".
-	pwa := func(c *gin.Context) {
-		values := gin.H{
-			"signUp": gin.H{"message": config.MsgSponsor, "url": config.SignUpURL},
-			"config": conf.ClientPublic(),
-		}
-		c.HTML(http.StatusOK, conf.TemplateName(), values)
-	}
-	router.Any(conf.BaseUri("/library/*path"), pwa)
-
-	// Progressive Web App (PWA) Manifest.
-	manifest := func(c *gin.Context) {
-		c.Header("Cache-Control", "no-store")
-		c.Header("Content-Type", "application/json")
-
-		clientConfig := conf.ClientPublic()
-		c.HTML(http.StatusOK, "manifest.json", gin.H{"config": clientConfig})
-	}
-	router.Any(conf.BaseUri("/manifest.json"), manifest)
-
-	// Progressive Web App (PWA) Service Worker.
-	swWorker := func(c *gin.Context) {
-		c.Header("Cache-Control", "no-store")
-		c.File(filepath.Join(conf.BuildPath(), "sw.js"))
-	}
-	router.Any("/sw.js", swWorker)
-
-	if swUri := conf.BaseUri("/sw.js"); swUri != "/sw.js" {
-		router.Any(swUri, swWorker)
-	}
-
 	// Serves static favicon.
 	router.StaticFile(conf.BaseUri("/favicon.ico"), filepath.Join(conf.ImgPath(), "favicon.ico"))
 
diff --git a/internal/server/routes_test.go b/internal/server/routes_test.go
index ea2c25022..2745c3dce 100644
--- a/internal/server/routes_test.go
+++ b/internal/server/routes_test.go
@@ -3,6 +3,7 @@ package server
 import (
 	"net/http"
 	"net/http/httptest"
+	"strings"
 	"testing"
 
 	"github.com/gin-gonic/gin"
@@ -24,33 +25,35 @@ func TestStaticRoutes(t *testing.T) {
 	// Register routes.
 	registerStaticRoutes(r, conf)
 
-	t.Run("GetHome", func(t *testing.T) {
+	t.Run("GetRoot", func(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest("GET", "/", nil)
 		r.ServeHTTP(w, req)
 		assert.Equal(t, 307, w.Code)
 		assert.Equal(t, "<a href=\"/library/browse\">Temporary Redirect</a>.\n\n", w.Body.String())
 	})
-	t.Run("HeadHome", func(t *testing.T) {
+	t.Run("HeadRoot", func(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest("HEAD", "/", nil)
 		r.ServeHTTP(w, req)
 		assert.Equal(t, 307, w.Code)
 	})
-	t.Run("GetServiceWorker", func(t *testing.T) {
-		w := httptest.NewRecorder()
-		req, _ := http.NewRequest("GET", "/sw.js", nil)
-		r.ServeHTTP(w, req)
-		assert.Equal(t, 200, w.Code)
-		assert.NotEmpty(t, w.Body)
-	})
-	t.Run("HeadServiceWorker", func(t *testing.T) {
-		w := httptest.NewRecorder()
-		req, _ := http.NewRequest("HEAD", "/sw.js", nil)
-		r.ServeHTTP(w, req)
-		assert.Equal(t, 200, w.Code)
-		assert.Empty(t, w.Body)
-	})
+}
+
+func TestPWARoutes(t *testing.T) {
+	// Create router.
+	r := gin.Default()
+
+	// Get test config.
+	conf := config.TestConfig()
+
+	// Find and load templates.
+	r.LoadHTMLFiles(conf.TemplateFiles()...)
+
+	// Register routes.
+	registerPWARoutes(r, conf)
+
+	// Bootstrapping.
 	t.Run("GetLibrary", func(t *testing.T) {
 		w := httptest.NewRecorder()
 		req, _ := http.NewRequest("GET", "/library/", nil)
@@ -58,9 +61,9 @@ func TestStaticRoutes(t *testing.T) {
 		assert.Equal(t, 200, w.Code)
 		assert.NotEmpty(t, w.Body)
 	})
-	t.Run("GetLibrary", func(t *testing.T) {
+	t.Run("HeadLibrary", func(t *testing.T) {
 		w := httptest.NewRecorder()
-		req, _ := http.NewRequest("GET", "/library/", nil)
+		req, _ := http.NewRequest("HEAD", "/library/", nil)
 		r.ServeHTTP(w, req)
 		assert.Equal(t, 200, w.Code)
 		assert.NotEmpty(t, w.Body)
@@ -78,4 +81,34 @@ func TestStaticRoutes(t *testing.T) {
 		r.ServeHTTP(w, req)
 		assert.Equal(t, 200, w.Code)
 	})
+
+	// Manifest.
+	t.Run("GetManifest", func(t *testing.T) {
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest("GET", "/manifest.json", nil)
+		r.ServeHTTP(w, req)
+		assert.Equal(t, 200, w.Code)
+		assert.NotEmpty(t, w.Body.String())
+		manifest := w.Body.String()
+		t.Logf("PWA Manifest: %s", manifest)
+		assert.True(t, strings.Contains(manifest, `"scope": "/",`))
+		assert.True(t, strings.Contains(manifest, `"start_url": "/library/",`))
+		assert.True(t, strings.Contains(manifest, "/static/icons/logo/128.png"))
+	})
+
+	// Service worker.
+	t.Run("GetServiceWorker", func(t *testing.T) {
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest("GET", "/sw.js", nil)
+		r.ServeHTTP(w, req)
+		assert.Equal(t, 200, w.Code)
+		assert.NotEmpty(t, w.Body)
+	})
+	t.Run("HeadServiceWorker", func(t *testing.T) {
+		w := httptest.NewRecorder()
+		req, _ := http.NewRequest("HEAD", "/sw.js", nil)
+		r.ServeHTTP(w, req)
+		assert.Equal(t, 200, w.Code)
+		assert.Empty(t, w.Body)
+	})
 }
diff --git a/pkg/clean/color.go b/pkg/clean/color.go
new file mode 100644
index 000000000..4d5eee3f9
--- /dev/null
+++ b/pkg/clean/color.go
@@ -0,0 +1,25 @@
+package clean
+
+import (
+	"strings"
+)
+
+// Color sanitizes HTML color codes and returns them in lowercase if they are valid, or an empty string otherwise.
+func Color(s string) string {
+	s = strings.ToLower(s)
+
+	// Remove unwanted characters.
+	s = strings.Map(func(r rune) rune {
+		if r < 48 && r > 57 && 97 < r && r > 102 && r != 35 {
+			return -1
+		}
+		return r
+	}, s)
+
+	// Invalid?
+	if l := len(s); l != 4 && l != 7 && l != 9 {
+		return ""
+	}
+
+	return s
+}
diff --git a/pkg/clean/color_test.go b/pkg/clean/color_test.go
new file mode 100644
index 000000000..423ea1408
--- /dev/null
+++ b/pkg/clean/color_test.go
@@ -0,0 +1,31 @@
+package clean
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestColor(t *testing.T) {
+	t.Run("Empty", func(t *testing.T) {
+		assert.Equal(t, "", Color(""))
+	})
+	t.Run("Black", func(t *testing.T) {
+		assert.Equal(t, "#000000", Color("#000000"))
+	})
+	t.Run("White", func(t *testing.T) {
+		assert.Equal(t, "#ffffff", Color("#FFFFFF"))
+	})
+	t.Run("Short", func(t *testing.T) {
+		assert.Equal(t, "#ab1", Color("#aB1"))
+	})
+	t.Run("Alpha", func(t *testing.T) {
+		assert.Equal(t, "#0123456a", Color("#0123456A"))
+	})
+	t.Run("TooLong", func(t *testing.T) {
+		assert.Equal(t, "", Color("#01234567AA"))
+	})
+	t.Run("TooShort", func(t *testing.T) {
+		assert.Equal(t, "", Color("#00"))
+	})
+}