Is it possible to only change the guibg of the current window?

Question

As title. Say I have 2 (vertical) window splits, I just want to change the background color of the right one. Is this even possible? If so, How?

Answer 1

This is :h 'wincolor' in Vim. And :h 'winhighlight' in Neovim.

:execute printf("hi RandomBg guibg=#%x", rand() % 0xFFFFFF)
:let w = winnr("l")
:if has("nvim")
:  call setwinvar(w, "&winhighlight", "Normal:RandomBg")
:else
:  call setwinvar(w, "&wincolor", "RandomBg")
:endif