True Color and Italics w/alacritty + tmux + vim

alacritty-tmux-vim_truecolor.md

This should make true-color and italics work in your tmux session.

Tested successfully in bash and zsh with latest packages from Arch (with exception of Neovim from Git) 20019-07-07.

Notes

1. Don't use &t_8f and &t_8b in your vim config
2. Don't set $TERM in your zshrc, bashrc, etc. Let your terminal set this. So far xterm-256color has worked best for me.

Testing colors

Running this script should look the same in tmux as without.

curl -s https://gist.githubusercontent.com/lifepillar/09a44b8cf0f9397465614e622979107f/raw/24-bit-color.sh >24-bit-color.sh
bash 24-bit-color.sh

Configuration files

Alacritty

In ~/.config/alacritty/alacritty.yml:

env:
  TERM: xterm-256color

Tmux

In ~/.tmux.conf

This also works in other terminals

set -g default-terminal "tmux-256color"
set -ag terminal-overrides ",xterm-256color:RGB"

Vim

In ~/.vimrc or ~/.config/nvim/init.vim:

set termguicolors

You might have to set your colorscheme after this entry.