def print_all() -> None:
    """ Print all 256 xterm color codes. """
    for code in sorted(term2hex_map):
        print(' '.join((
            '\033[48;5;{code}m{code:<3}:{hexval:<6}\033[0m',
            '\033[38;5;{code}m{code:<3}:{hexval:<6}\033[0m'
        )).format(code=code, hexval=term2hex_map[code]))