docs: def get_visible_color(color):
      """Get the visible counter-color."""
      if isinstance(color, (str, type(""))):
          try:
              return getattr(_Visible, str('{}'.format(color)))
          except AttributeError:
              raise ValueError("incorrect color: {!r}".format(color))
      elif isinstance(color, tuple):
          return (0x80 ^ color[0], 0x80 ^ color[1], 0x80 ^ color[2])
      elif isinstance(color, int):
          if 0 <= color <= 0x07:
              index = color
              return 0xFF if index == 0 else 0xE8
          elif 0x08 <= color <= 0x0F:
              index = color - 0x08
              return 0xFF if index == 0 else 0xE8
          elif 0x10 <= color <= 0xE7:
              index = color - 0x10
              if 0 <= index % 36 < 18:
                  return 0xFF
              else:
                  return 0x10
          elif 0xE8 <= color <= 0xFF:
              index = color - 0x0E8
              return 0xFF if 0 <= index < 12 else 0xE8
      else:
          raise ValueError("incorrect color: {!r}".format(color))