new_contents: #!/usr/bin/env python
  # -*- coding: UTF-8 -*-
  
  from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  
  import matplotlib
  
  def create_color_list():
      color_names = matplotlib.colors.cnames
      color_list  = []
      for key,value in color_names.items():
          ivalue = int(value[1:], 16)
          rvalue = int(value[1:3],16)
          gvalue = int(value[3:5],16)
          bvalue = int(value[5:], 16)
          color_list.append([key, value, ivalue, rvalue, gvalue, bvalue])
      return color_list
  
  def sort_color_list(color_list, sort_index):
      return sorted(color_list, key=lambda c: c[sort_index])
  
  def print_color_list(color_list,sort_order=None):
      if sort_order=='alphabetical':
          sorted_list = sort_color_list(color_list, sort_index=0)
      elif sort_order=='value':
          sorted_list = sort_color_list(color_list, sort_index=2)
      elif sort_order=='red':
          sorted_list = sort_color_list(color_list, sort_index=3)
      elif sort_order=='green':
          sorted_list = sort_color_list(color_list, sort_index=4)
      elif sort_order=='blue':
          sorted_list = sort_color_list(color_list, sort_index=5)
      else:
          # No sort order
          for item in color_list:
              key, value, ivalue, r, g, b = item
              print('{0}: {1}'.format(value,key))
          return
  
      for item in sorted_list:
          key, value, ivalue, r, g, b = item
          print('{0}: {1}'.format(value,key))
  
  if __name__ == "__main__":
      color_list  = create_color_list()
      print_color_list(color_list,sort_order='alphabetical')
  
subject: Add printing of color codes in matplotlib