diff --git a/scss/helpers/_colored-links.scss b/scss/helpers/_colored-links.scss
index b9ea58ee121a..06c8ce412041 100644
--- a/scss/helpers/_colored-links.scss
+++ b/scss/helpers/_colored-links.scss
@@ -1,14 +1,17 @@
+// stylelint-disable function-name-case
+
+// All-caps `RGBA()` function used because of this Sass bug: https://github.com/sass/node-sass/issues/2251
 @each $color, $value in $theme-colors {
   .link-#{$color} {
     --#{$prefix}link-color-rgb: #{to-rgb($value)};
-    text-decoration-color: rgba(to-rgb($value), var(--#{$prefix}link-underline-opacity, 1));
+    text-decoration-color: RGBA(to-rgb($value), var(--#{$prefix}link-underline-opacity, 1));
 
     @if $link-shade-percentage != 0 {
       &:hover,
       &:focus {
         $hover-color: if(color-contrast($value) == $color-contrast-light, shade-color($value, $link-shade-percentage), tint-color($value, $link-shade-percentage));
         --#{$prefix}link-color-rgb: #{to-rgb($hover-color)};
-        text-decoration-color: rgba(to-rgb($hover-color), var(--#{$prefix}link-underline-opacity, 1));
+        text-decoration-color: RGBA(to-rgb($hover-color), var(--#{$prefix}link-underline-opacity, 1));
       }
     }
   }