An overhaul of decoldest.vim via rewrite in lua and addition of tasteful accents. This is tuned to my personal setup, so some highlight groups are not styled, but the source is straightforward and easy to modify.
Note
Neovim v0.10.0+ recommended. Earlier versions do not seem to apply highlights correctly.
To aid in writing absolutely disgusting tmux configs, strings, format strings, and escapes are specifically highlighted to hopefully make the job less painful than it already is.