--- a/browser/themes/shared/customizableui/customizeMode.inc.css
+++ b/browser/themes/shared/customizableui/customizeMode.inc.css
@@ -470,16 +470,20 @@ toolbarpaletteitem[place=toolbar] > tool
   border: 1px solid transparent;
   margin: 0 -5px 5px;
   padding-top: 0;
   padding-inline-end: 5px;
   padding-bottom: 0;
   padding-inline-start: 0;
 }
 
+.customization-uidensity-menu-button {
+  color: inherit;
+}
+
 .customization-lwtheme-menu-theme[defaulttheme] {
   list-style-image: url(chrome://browser/content/default-theme-icon.svg);
 }
 
 %ifdef MOZ_PHOTON_THEME
 #customization-uidensity-menu-button-normal {
   list-style-image: url("chrome://browser/skin/customizableui/density-normal.svg");
 }