diff --git a/panel/dist/css/chat_feed.css b/panel/dist/css/chat_feed.css
index a19e30c8fa..b06b7f24ca 100644
--- a/panel/dist/css/chat_feed.css
+++ b/panel/dist/css/chat_feed.css
@@ -7,5 +7,5 @@
 }
 
 ::-webkit-scrollbar-thumb {
-  background-color: var(--panel-surface-color, #f1f1f1);
+  background-color: var(--panel-secondary-color, #f1f1f1);
 }