diff --git a/browser/themes/shared/controlcenter/panel.inc.css b/browser/themes/shared/controlcenter/panel.inc.css
index 78b8633f7ef8..07e1f5dad74e 100644
--- a/browser/themes/shared/controlcenter/panel.inc.css
+++ b/browser/themes/shared/controlcenter/panel.inc.css
@@ -285,7 +285,7 @@
   -moz-appearance: none;
   margin: 0;
   border: none;
-  border-top: 1px solid #ccc;
+  border-top: 1px solid var(--panel-separator-color);
   padding: 8px 20px;
   color: ButtonText;
   background-color: transparent;