docs: def color_is_disabled(**envars):
      ''' Look for clues in environment, e.g.:
  
          - https://bixense.com/clicolors/
          - http://no-color.org/
  
          Arguments:
              envars:     Additional environment variables to check for
                          equality, i.e. ``MYAPP_COLOR_DISABLED='1'``
  
          Returns:
              None, Bool:  Disabled
      '''
      result = None
      if 'NO_COLOR' in env:
          result = True
      elif env.CLICOLOR == '0':
          result = True
  
      log.debug('%r (NO_COLOR=%s, CLICOLOR=%s)', result,
                env.NO_COLOR or '',
                env.CLICOLOR or ''
      )
      for name, value in envars.items():
          envar = getattr(env, name)
          if envar.value == value:
              result = True
          log.debug('%s == %r: %r', name, value, result)
  
      return result