diff --git a/packages/dockview-core/src/theme.scss b/packages/dockview-core/src/theme.scss
index 96c259d5f..ca0cb67c6 100644
--- a/packages/dockview-core/src/theme.scss
+++ b/packages/dockview-core/src/theme.scss
@@ -326,7 +326,7 @@
     --dv-tabs-and-actions-container-background-color: #fcfcfc;
     //
     --dv-activegroup-visiblepanel-tab-background-color: #f0f1f2;
-    --dv-activegroup-hiddenpanel-tab-background-color: ##fcfcfc;
+    --dv-activegroup-hiddenpanel-tab-background-color: #fcfcfc;
     --dv-inactivegroup-visiblepanel-tab-background-color: #f0f1f2;
     --dv-inactivegroup-hiddenpanel-tab-background-color: #fcfcfc;
     --dv-tab-divider-color: transparent;