Script to show all 256 colors supported by xterms

show-all-256-colors.py

#!/usr/bin/python
"""Print a swatch using all 256 colors of 256-color-capable terminals."""


__author__ = "Marius Gedminas <marius@gedmin.as>"
__url__ = "https://gist.github.com/mgedmin/2762225"
__version__ = '2.0'


def hrun(start, width, padding=0):
    return [None] * padding + list(range(start, start + width)) + [None] * padding


def vrun(start, width, height, padding=0):
    return [hrun(s, width, padding)
            for s in range(start, start + width * height, width)]


layout = [
    vrun(0, 8, 2),                # 16 standard xterm colors
    vrun(16, 6, 6 * 6, 1),        # 6x6x6 color cube
    vrun(16 + 6 * 6 * 6, 8, 3),   # 24 grey levels
]


def fg_seq(color):
    return '\033[38;5;%dm' % color


def bg_seq(color):
    return '\033[48;5;%dm' % color

reset_seq = '\033[0m'


def color_bar(seq, color, trail):
    if color is None:
        return '%s    %s' % (reset_seq, trail)
    else:
        return '%s %03d%s' % (seq(color), color, trail)


def main():
    for block in layout:
        print("")
        for row in block:
            fg_bar = ''.join(color_bar(fg_seq, color, '') for color in row)
            bg_bar = ''.join(color_bar(bg_seq, color, ' ') for color in row)
            print('%s%s    %s%s' % (fg_bar, reset_seq, bg_bar, reset_seq))


if __name__ == '__main__':
    main()

Version 2.0: support Python 3 (as well as Python 2).

wow. Thats really cool!

Really cool

This is really nicely done. I was interested in running it without Python, so I wrote a Bash translation: https://gist.github.com/ivanbrennan/8ce10a851851e5f04728d8da900ef1c5

thanks, it help me a lot!!

A newer version is at https://github.com/mgedmin/scripts/blob/master/show-all-256-colors. You can give it color numbers as command-line arguments and it'll show just those colors, plus their RGB values that match my terminal.

In my opinion if the new py program has its pic, it will be better~
I do like your pic that help me get the right color in my little program.

Yeah, without any arguments it prints the same diagram as before.

I use the RGB values to make Vim color schemes to have guifg=#rrggbb match my ctermfg=208 etc.