diff --git a/browser/main/global.styl b/browser/main/global.styl
index 8f3216ef..e4505a4e 100644
--- a/browser/main/global.styl
+++ b/browser/main/global.styl
@@ -152,3 +152,7 @@ body[data-theme="monokai"]
       background-color $ui-monokai-backgroundColor
   .sortableItemHelper
     color: $ui-monokai-text-color
+
+body[data-theme="default"]
+  .SideNav ::-webkit-scrollbar-thumb
+    background-color rgba(255, 255, 255, 0.3)