How to use ansi colors in fzf --header?

Question

I have try to change the font color in fzf's header.

Here's an example: https://github.com/linrongbin16/fzfx.vim/blob/fa1723e8185e3c2e3d45b6937383ef283c0d3297/autoload/fzfx/vim.vim#L88

But the ansi color code is not working, it just prints:

:: Press [0;31mCTRL-G[0m to fuzzy search

How can I fix it?

Answer 1

You are missing the escape character before the ANSI sequence.

There are several ways how to represent this character. To type it literally in vim do ctrl+v then Esc in insert mode. In vim that character is displayed as ^[ with special highlighting, so it should eventually look:

Alternatively, you are better to fix set_ansi_color():

function! s:set_ansi_color(content)
    return nr2char(0x1B).s:ansi_colors.red.a:content.s:ansi_colors.clear
endfunction