class_docstr: RGB colors container
  
  Provides a quick color access.
  
  >>> from colour import RGB
  
  >>> RGB.WHITE
  (1.0, 1.0, 1.0)
  >>> RGB.BLUE
  (0.0, 0.0, 1.0)
  
  >>> RGB.DONOTEXISTS  # doctest: +ELLIPSIS
  Traceback (most recent call last):
  ...
  AttributeError: ... has no attribute 'DONOTEXISTS'
code: def __getattr__(self, value):
      return hsl2rgb(getattr(HSL, value))
  
imports: from __future__ import with_statement, print_function
  import hashlib
  import re
  import sys
label_desc: Use image node_id 1 for calling the C_RGB obj's underlying member method code with example usage: obj.__getattr__(value) and returns: hsl2rgb