change gray color to 200

packages/app/src/styles/theme/_apply-colors-light.scss

@@ -175,7 +175,7 @@ $border-color: $border-color-global;
         background: $bgcolor-list-hover;
       }
       &.grw-pagetree-is-over {
-        background: $gray-300;
+        background: $gray-200;
       }
 
       .grw-pagetree-count {