diff --git a/scss/helpers/_color-bg.scss b/scss/helpers/_color-bg.scss
index c00acde5c07d..1a3a4cffd656 100644
--- a/scss/helpers/_color-bg.scss
+++ b/scss/helpers/_color-bg.scss
@@ -1,8 +1,7 @@
 // All-caps `RGBA()` function used because of this Sass bug: https://github.com/sass/node-sass/issues/2251
 @each $color, $value in $theme-colors {
-  $color-rgb: to-rgb($value);
   .text-bg-#{$color} {
     color: color-contrast($value) if($enable-important-utilities, !important, null);
-    background-color: RGBA($color-rgb, var(--#{$prefix}bg-opacity, 1)) if($enable-important-utilities, !important, null);
+    background-color: RGBA(var(--#{$prefix}#{$color}-rgb), var(--#{$prefix}bg-opacity, 1)) if($enable-important-utilities, !important, null);
   }
 }