Look for clues in environment, e.g.:

        - https://bixense.com/clicolors/
        - http://no-color.org/

        Returns:
            Bool:  Allowed

def color_is_allowed():
    ''' Look for clues in environment, e.g.:

        - https://bixense.com/clicolors/
        - http://no-color.org/

        Returns:
            Bool:  Allowed
    '''
    result = True  # generally yes - env.CLICOLOR != '0'

    if color_is_disabled():
        result = False

    log.debug('%r', result)
    return result