Change highlight color after initialization

[xeruf]

I would like to set the whitespace highlight color depending on the background, which seems to be automatically detected by neovim at some point, but stays at 'dark' while my vimrc is being loaded.

So I tried this:

let g:better_whitespace_guicolor='Brown'
autocmd OptionSet background let g:better_whitespace_guicolor=&background == 'light' ? 'LightYellow' : 'Brown'

Then, after background is set to 'light', :echo g:better_whitespace_guicolor returns 'LightYellow', yet the whitespace is highlighted in Brown.

[Cimbali]

This is indeed not supported yet. You can probably use the command to modify the highlight group directly, in addition to setting the variable:

:highlight ExtraWhitespace guibg='LightYellow'

Also it might be ctermbg you want and not guibg if your neovim is running in a terminal rather than a window.

[xeruf]

Since I'm using termguicolors, guibg is correct here. Thanks :)