Apply deep background color for selected pane

Saola Animate version: v3.0; OS: Win 10;
image
As you can see the screencut above, you cannot know which pane is currently selected now,
So please apply a deep enough background color (ex. black or #1f1f1f) for current selected pane.

Regards,
Afei
;;

There is an arrow under the selected icon / pane.

The key point is “User cannot know which pane is currently working now”.
image
When you see the figure above, you might guess “where am I?”,
because you don’t know which pane is selected by you.
but if it change to the figure below, you will know “I am on 2nd one” right now:
image
That is what I mean about “deep background color for selected pane”.