Update instructions for setting termguicolors

README.md

@@ -35,26 +35,25 @@ Conversion from original colors to 256 colors has done according to
 ## Usage
 
 1. Check your terminal.
- - If your terminal emulator supports 24-bit color, add the following lines
- to your `.vimrc`.
+ - If your terminal emulator [supports true colors](https://gist.github.com/XVilka/8346728),
+ add the following lines to your `.vimrc`.
 
  ``` vim
  " Use 24-bit (true-color) mode in Vim/Neovim when outside tmux or screen.
  " If you're using tmux version 2.2 or later, you can remove the outermost $TMUX
  " check and use tmux's 24-bit color support
- " (<http://sunaku.github.io/tmux-24bit-color.html#usage> for more information.)
+ " (http://sunaku.github.io/tmux-24bit-color.html#usage for more information.)
  if empty($TMUX) && empty($STY)
- if has('nvim')
- " For Neovim 0.1.3 and 0.1.4 <https://github.com/neovim/neovim/pull/2198>
- let $NVIM_TUI_ENABLE_TRUE_COLOR = 1
- endif
- " For Neovim > 0.1.5 and Vim > patch 7.4.1799
- " <https://github.com/vim/vim/commit/61be73bb0f965a895bfb064ea3e55476ac175162>
- " Based on Vim patch 7.4.1770 (`guicolors` option)
- " <https://github.com/vim/vim/commit/8a633e3427b47286869aa4b96f2bfc1fe65b25cd>
- " <https://github.com/neovim/neovim/wiki/Following-HEAD#20160511>
- if has('termguicolors')
- set termguicolors
+ " See https://gist.github.com/XVilka/8346728.
+ if $COLORTERM =~# 'truecolor' || $COLORTERM =~# '24bit'
+ if has('termguicolors')
+ " See :help xterm-true-color
+ if $TERM =~# '^screen'
+ let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
+ let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"
+ endif
+ set termguicolors
+ endif
  endif
  endif
  ```