colours_to_filter = []
  for coltype in allowed_colour_types:
    if coltype == 'ALL':
      for n in range(0, 215):
        colours_to_filter.append(n)
      break
    if coltype == 'GRAYSCALE':
      for n in range(1, 16):
        colours_to_filter.append(n)
    if coltype == 'METAL': 
      for n in range(16, 24):
        colours_to_filter.append(n)