Clock Panel background is blacker than dark background

Sorry again for a newbie rant, but this is something that really bothers me aesthetically.

Background of the Clock panel seems to very black. It is blacker than the dark dashboard background even if transparency is selected. It is really disturbing in a very good quality and high contrast display.

If I change Transparency option of the panel “Display panel without a background.” to disabled it will display a thin halo around the box which is even more not acceptable.

My suggestion how to fix this:

  1. Fix the panel so that it is actually transparent
  2. Let us change the entire dashboard background to true black instead of almost black