Darker focus highlight

packages/@uppy/dashboard/src/style.scss

@@ -319,7 +319,7 @@
 
   .uppy-DashboardTab-btn:active,
   .uppy-DashboardTab-btn:focus {
-    background-color: darken($gray-100--highlighted, 1%);
+    background-color: darken($gray-100--highlighted, 2%);
     outline: none;
   }