Fixing colors in Emacs themes in tmux
For years I’ve struggled with certain themes in Emacs having incorrect colors
when run in the terminal (
emacs -nw) but appearing correct in GUI Emacs.
Finally found a solution - the issue was with tmux. The fix for me was to
include this in my .tmux.conf:
set -g default-terminal 'screen-256color' set -ga terminal-overrides ',*256col*:Tc'
This comes from https://github.com/alacritty/alacritty/issues/109#issuecomment-440353106. There are a number of other similar suggested fixes in that thread if this doesn’t work.
One thing that made testing this easier is this script:
curl -s https://gist.githubusercontent.com/lifepillar/09a44b8cf0f9397465614e622979107f/raw/24-bit-color.sh >24-bit-color.sh bash 24-bit-color.sh
With the correct settings, each row of colors is an almost smooth gradient. With the incorrect settings, there are clear discrepancies in the gradient.
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