diff --git a/src/scss/mixins/_mixins.scss b/src/scss/mixins/_mixins.scss
index 01498fe5d..fde4131c2 100644
--- a/src/scss/mixins/_mixins.scss
+++ b/src/scss/mixins/_mixins.scss
@@ -60,9 +60,9 @@
 
 @mixin focus-ring($show-border: false) {
   outline: 0;
-  box-shadow: 0 0 $focus-ring-blur $focus-ring-width rgba(var(--tblr-primary-rgb), 0.25);
+  box-shadow: 0 0 $focus-ring-blur $focus-ring-width rgba(var(--#{$prefix}primary-rgb), 0.25);
 
   @if($show-border) {
-    border-color: rgba(var(--tblr-primary-rgb), 0.25);
+    border-color: rgba(var(--#{$prefix}primary-rgb), 0.25);
   }
-}
\ No newline at end of file
+}