class_docstr: A helper for mapping categorical values to colors on demand.
code: def colors(self):
      return self._colors
  
file_path: yellowbrick/yellowbrick/style/colors.py
imports: import random
  import warnings
  import numpy
  import matplotlib
  import matplotlib.cm
  from copy import copy
  from yellowbrick.exceptions import YellowbrickValueError
  from distutils.version import LooseVersion
label_desc: Use image node_id 2 for calling the ColorMap obj's underlying member method code with example usage: obj.colors() and returns: self