Ability to set color for Reveal in Binder

I’m in the Windows version as I type this and I can’t find the ability so I want to log an enhancement request.

Request: Will you please be so kind as to add the ability to set the color or background for Reveal in Binder? Why? I can’t see it. I’d like to be able to set it to a background color I can’t miss. The dot is NOT always readily visible.

Thanks!