code: def _determine_bg_rgb():
      """Helper method that returns background color RGB."""
      if FLAGS.bg_color_name is not None:
          return ImageColor.getrgb(FLAGS.bg_color_name)
      return tuple(FLAGS.bg_color_rgb)
  
file_path: facets/facets_atlasmaker/atlasmaker.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import os
  from absl import app
  from absl import flags
  from absl import logging
  from PIL import ImageColor
  import atlasmaker_io
  import convert
  import montage
  import parallelize
label_desc: Use image node_id 1 for calling a global function with example usage: _determine_bg_rgb() and returns: tuple, ImageColor