Add some escape sequences for tmux true color

neovim/lua/_settings.lua

@@ -5,6 +5,10 @@ local utils = require("utils")
 -- Set leader to space
 g.mapleader = " "
 
+vim.cmd([[
+    let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
+    let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
+]])
 o.termguicolors = true
 o.number = true
 o.expandtab = true

vim/rc/ui.rc.vim

@@ -111,6 +111,12 @@ if &term =~# '^screen'
         set term=xterm
     endif
 
+    if exists('+termguicolors')
+        let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
+        let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
+        set termguicolors
+    endif
+
     " gotta set these *last*, since `set term` resets everything
     set t_ts=k
     set t_fs=\