Some design fixes.

The design has been improved and color of the day of the week is highlighted. (edited)

src/sass/_colors.scss

@@ -159,6 +159,10 @@ $panel_top_color:                   if($variant == 'dark', #333333, #f5f5f5);
 $panel_bottom_color:                if($variant == 'dark', #2a2a2a, #e2e2e2);
 $panel_border_color:                if($variant == 'light', rgba(white, 0.22), rgba(black, 0.22));
 
+// Calendar colors
+
+$calendar_high:                     if($variant == 'dark', #fff, #000);
+
 // Entry colors
 $entry_bg:                          if($variant == 'light', rgba(black, 0.05), rgba(white, 0.05));
 $entry_shell_bg:                    if($variant == 'light', rgba(black, 0.1), rgba(white, 0.1));

src/sass/gnome-shell/widgets/_calendar.scss

@@ -53,6 +53,7 @@
   .day-label {
     @include font(title);
     font-weight: bold;
+    color: $calendar_high;
   }
 
   // date label

src/sass/gnome-shell/widgets/_panel.scss

@@ -66,10 +66,10 @@ $shell_panel_bg: if($trans == 'true', $panel_bg, rgba($panel_bg, 0.95));
     -minimum-hpadding: 8px;
     font-weight: bold;
     color: $panel_fg;
-    transition-duration: $longer_duration;
-    border-radius: $bt_radius;
-    // margin-top: 2px;
-    // margin-bottom: 2px;
+    transition-duration: 190ms;
+    border-radius: $bd_radius;
+    background: transparent;
+    margin: 3px 1px;
 
     StLabel { padding: 0 2px; }