adjust sidebar color

src/client/styles/scss/theme/default.scss

@@ -53,7 +53,7 @@ html[light] {
   $bgcolor-sidebar: #122c55;
   $color-sidebar-context: $color-global;
   $bgcolor-sidebar-context: #f4f6fc;
-  $bgcolor-sidebar-item-active: rgba(#000000, 0.3); // optional
+  $bgcolor-sidebar-item-active: rgba(#000000, 0.37); // optional
   $text-shadow-sidebar-item-active: 0px 0px 10px #0099ff; // optional
   // Sidebar resize button
   $color-resize-button: $color-reversal;