old_contents: # -*- coding: utf-8 -*-
  """
  Showcases colour models volume and gamut plotting examples.
  """
  
  import numpy as np
  
  from colour.plotting import (plot_RGB_colourspaces_gamuts, plot_RGB_scatter,
                               colour_style)
  from colour.utilities import message_box
  
  message_box('Colour Models Volume and Gamut Plots')
  
  colour_style()
  
  message_box(('Plotting "ITU-R BT.709" RGB colourspace volume in "CIE xyY" '
               'colourspace.'))
  plot_RGB_colourspaces_gamuts(
      ('ITU-R BT.709', ), reference_colourspace='CIE xyY')
  
  print('\n')
  
  message_box(('Comparing "ITU-R BT.709" and "ACEScg" RGB colourspaces volume '
               'in "CIE L*a*b*" colourspace.'))
  plot_RGB_colourspaces_gamuts(
      ('ITU-R BT.709', 'ACEScg'),
      reference_colourspace='CIE Lab',
      style={
          'face_colours': (None, (0.25, 0.25, 0.25)),
          'edge_colours': (None, (0.25, 0.25, 0.25)),
          'edge_alpha': (1.0, 0.1),
          'face_alpha': (1.0, 0.0)
      })
  
  print('\n')
  
  message_box(('Plotting "ACEScg" colourspaces values in "CIE L*a*b*" '
               'colourspace.'))
  
  RGB = np.random.random((32, 32, 3))
  
  plot_RGB_scatter(
      RGB,
      'ACEScg',
      reference_colourspace='CIE Lab',
      colourspaces=('ACEScg', 'ITU-R BT.709'),
      face_colours=((0.25, 0.25, 0.25), None),
      edge_colours=((0.25, 0.25, 0.25), None),
      edge_alpha=(0.1, 0.5),
      face_alpha=(0.1, 0.5),
      grid_face_colours=(0.1, 0.1, 0.1),
      grid_edge_colours=(0.1, 0.1, 0.1),
      grid_edge_alpha=0.5,
      grid_face_alpha=0.1)
  
new_contents: # -*- coding: utf-8 -*-
  """
  Showcases colour models volume and gamut plotting examples.
  """
  
  import numpy as np
  
  from colour.plotting import (plot_RGB_colourspaces_gamuts, plot_RGB_scatter,
                               colour_style)
  from colour.utilities import message_box
  
  message_box('Colour Models Volume and Gamut Plots')
  
  colour_style()
  
  message_box(('Plotting "ITU-R BT.709" RGB colourspace volume in "CIE xyY" '
               'colourspace.'))
  plot_RGB_colourspaces_gamuts(
      ('ITU-R BT.709', ), reference_colourspace='CIE xyY')
  
  print('\n')
  
  message_box(('Comparing "ITU-R BT.709" and "ACEScg" RGB colourspaces volume '
               'in "CIE L*a*b*" colourspace.'))
  plot_RGB_colourspaces_gamuts(
      ('ITU-R BT.709', 'ACEScg'),
      reference_colourspace='CIE Lab',
      face_colours=(None, (0.25, 0.25, 0.25)),
      edge_colours=(None, (0.25, 0.25, 0.25)),
      edge_alpha=(1.0, 0.1),
      face_alpha=(1.0, 0.0))
  
  print('\n')
  
  message_box(('Plotting "ACEScg" colourspaces values in "CIE L*a*b*" '
               'colourspace.'))
  
  RGB = np.random.random((32, 32, 3))
  
  plot_RGB_scatter(
      RGB,
      'ACEScg',
      reference_colourspace='CIE Lab',
      colourspaces=('ACEScg', 'ITU-R BT.709'),
      face_colours=((0.25, 0.25, 0.25), None),
      edge_colours=((0.25, 0.25, 0.25), None),
      edge_alpha=(0.1, 0.5),
      face_alpha=(0.1, 0.5),
      grid_face_colours=(0.1, 0.1, 0.1),
      grid_edge_colours=(0.1, 0.1, 0.1),
      grid_edge_alpha=0.5,
      grid_face_alpha=0.1)
  
subject: fix example of plot_RGB_colourspaces_gamuts