code: def colorspace(self):
          
          if self.image_mask:
              return None  # Undefined for image masks
          if self._colorspaces:
              if self._colorspaces[0] in self.SIMPLE_COLORSPACES:
                  return self._colorspaces[0]
              if self._colorspaces[0] == '/DeviceCMYK':
                  return self._colorspaces[0]
              if (
                  self._colorspaces[0] == '/Indexed'
                  and self._colorspaces[1] in self.SIMPLE_COLORSPACES
              ):
                  return self._colorspaces[1]
              if self._colorspaces[0] == '/ICCBased':
                  icc = self._colorspaces[1]
                  return icc.stream_dict.get('/Alternate', '')
          raise NotImplementedError(
              "not sure how to get colorspace: " + repr(self._colorspaces)
          )
docs: PDF name of the colorspace that best describes this image