code: def test_rgb_to_hsl_part_12():
      """Test rgb to hsl color function"""
      assert rgb_to_hsl(153, 102, 153) == (300, 20, 50)
      assert rgb_to_hsl(204, 51, 204) == (300, 60, 50)
      assert rgb_to_hsl(255, 0, 255) == (300, 100, 50)
  
imports: from __future__ import division
  from pygal.colors import darken, desaturate, hsl_to_rgb, lighten, parse_color, rgb_to_hsl, rotate, saturate, unparse_color
label_desc: Use image node_id 33 for calling a global function with example usage: test_rgb_to_hsl_part_12() without return types