'hi Whitespace' not applied correctly in v0.10.0

[brownd-oclc]

Problem

I looked around, but couldn't find an open issue for this. It seems like a fairly obvious issue, so sorry if I missed something.

Changing hi Whitespace in Nvim 0.10.0 seems to always apply the same style. Nvim 0.9.5 worked as expected.

Steps to reproduce

nvim-0.10.0 --clean file.md
:set list
:hi Whitespace ctermfg=Green ctermbg=Grey

Expected behavior

nvim-0.9.5 --clean file.md
:set list
:hi Whitespace ctermfg=Green ctermbg=Grey

Neovim version (nvim -v)

v0.10.0 release

Vim (not Nvim) behaves the same?

N/A

Operating system/version

RHEL8

Terminal name/version

iTerm

$TERM environment variable

xterm-256color

Installation

0.10.0 from https://github.com/neovim/neovim-releases

[clason]

Check if termguicolors is set (which is now detected automatically). If it is, you need to set guifg and guibg instead (or in addition).

[brownd-oclc]

Thanks for the quick comment!

termguicolors seems to what's happening. :set notermguicolors restores the previous behavior, and using guifg and guibg behaves as expected otherwise.