diff --git a/services/web/frontend/stylesheets/pages/editor/rail.scss b/services/web/frontend/stylesheets/pages/editor/rail.scss
index 9f667d8786..f694597066 100644
--- a/services/web/frontend/stylesheets/pages/editor/rail.scss
+++ b/services/web/frontend/stylesheets/pages/editor/rail.scss
@@ -213,7 +213,7 @@ body {
 .separated-rail-tab::before {
   display: inline-block;
   content: '';
-  border-top: 1px solid var(--border-divider);
+  border-top: 1px solid var(--border-divider-themed);
   width: 100%;
   transform: translateY(-12px);
 }