adjustment spring bg color.

packages/app/src/styles/theme/spring.scss

@@ -73,7 +73,7 @@ html[dark] {
   $bgcolor-resize-button-hover: lighten($bgcolor-resize-button, 5%);
   // Sidebar contents
   $color-sidebar-context: $subthemecolor;
-  $bgcolor-sidebar-context: #fff7ff;
+  $bgcolor-sidebar-context: #fdfffe;
   // Sidebar list group
   $bgcolor-sidebar-list-group: #fafbff; // optional