diff --git a/internal/photoprism/colors.go b/internal/photoprism/colors.go
index ce5f8765a..5b52ae7e2 100644
--- a/internal/photoprism/colors.go
+++ b/internal/photoprism/colors.go
@@ -91,8 +91,8 @@ func (c IndexedColor) Hex() string {
 }
 
 func (c IndexedColors) Hex() (result string) {
-	for _, materialColor := range c {
-		result += materialColor.Hex()
+	for _, indexedColor := range c {
+		result += indexedColor.Hex()
 	}
 
 	return result