Colour schemes on background


Description of the issue: I would like to change the grey colour background to something other than grey so its unique and I can distinguish it from say Google when I have several browsers open on 2 monitors

Expected result: In simple terms to a non Tech person show links to download new colour scheme

Brave Version( check About Brave):
Version 1.22.71 Chromium: 89.0.4389.114 (Official Build) (64-bit)