I want to change the background color of the windowing system to gray. The goal is, that e.g.
- Background color of empty tab in Firefox is gray
- Background color of all the frames in Thunderbird are gray
- Background color of a page in libre office is grey
- Background color of file managers is grey
In windows there was a very convenient option through Desktop->right click-> properties -> ... . How do I do this in xubuntu?
edit: here is a picture of the dialog in windows: picture colors in windows (you see, that I set the bgcolor to gray)