diff --git a/.tmux.conf b/.tmux.conf
new file mode 100644
index 0000000..fc74dbb
--- /dev/null
+++ b/.tmux.conf
@@ -0,0 +1,2 @@
+set -g default-terminal 'screen-256color'
+set -ga terminal-overrides ',screen-256color:Tc'
diff --git a/.vimrc b/.vimrc
index 5e3eb1c..b94dc15 100644
--- a/.vimrc
+++ b/.vimrc
@@ -30,6 +30,9 @@ filetype plugin indent on    " required
 " Colours
 colorscheme base16-default-dark
 syntax enable
+
+let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
+let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
 set termguicolors
 highlight LineNr term=bold cterm=NONE ctermfg=DarkGrey ctermbg=NONE gui=NONE guifg=DarkGrey guibg=NONE      " line number colours
 " Spaces & Tabs