Prints all ANSI colors in your terminal

colors.py

#!/usr/bin/env python
#-*- coding: utf-8 -*-

"""
Basic colors script
prints all ANSI colors from 0 to 256 
to show you your term's color mapping
"""

from sys import argv

BEGIN = "\033["
RESET = "\033[0m"
PRINT_TEXT=False
HELP_MSG = """
Colors Demo

Displays your terminal's available colors as defined by 
your terminal program. For most xterm-based terminals 
you can change it through modifying the $HOME/.Xresources 
and applying `xrdb -merge $HOME/.Xresources`

For Mac, ???????????????????
For Windows, ???????????????

Requires: Python

Options:
    -h, --help - displays this crappy message
    -t, --text - shows hexcodes of each color
    --pacman   - prints a Pacman!
    --haskell  - prints the Haskell logo
"""

pacman = [
    "...xxx....",
    "..xxx.x...",
    ".xxxxxxx..",
    ".xxx......",
    "..xxx.....",
    "...xxx....",
    ]

haskell = [
    ".x.xx.......",
    ".xx.xx......",
    "..xx.xx.xxxx",
    "...xx.xx....",
    "..xx.xxxx.xx",
    ".xx.xx..xx..",
    ".x.xx....xx.",
    ]

def fg(i):
    return "{}38;5;{}m".format(BEGIN, i)

def bg(i):
    return "{}48;5;{}m".format(BEGIN,i)

def combo(c, b, s):
    return "{}{}{}{}".format(bg(b), fg(c), s, RESET, RESET)

def hc(x):
    return hex(x).split('x').pop()[-2:].zfill(2) if PRINT_TEXT else "  "

def print_chart():
    # Print a title
    bc = 2
    banner = combo(0, bc, "  ")
    print("".join([banner for x in range(16)]))
    print("{}{}{}".format(banner, combo(2, 0, "Colors Demo".center(28)), banner))
    print("".join([banner for x in range(16)]))
    print()

    print("".join([combo(256-x, x, hc(x)) for x in range(16)]))
    print()
    for x in range(6):
        s = ""
        for y in range(36):
            num = 16+x+(y*6)
            inv = 233
            if num < 124:
                inv = 255
            s += combo(inv, num, hc(num))
        print(s)
        #print("".join([combo(256-(16+x+(y*6)), (16+x+(y*6)), hc((16+x+(y*6)))) for y in range(36)]))
    print()
    print("".join([combo(256-x, x, hc(x)) for x in range(232,257)]))

    return None

def print_array(pic_array, color):
    for row in pic_array:
        print("".join([(combo(0, color, "  ") if char == "x" else "  ") for char in row]))
    return None
    

if __name__ == "__main__":
    argv.pop(0)
    if "-h" in argv or "--help" in argv:
        print(HELP_MSG)
        quit()
    if "--pacman" in argv:
        print_array(pacman, 3)
        quit()
    if "--haskell" in argv:
        print_array(haskell, 5)
        quit()
    if "-t" in argv or "--text" in argv:
        PRINT_TEXT = True
    print_chart()