code: def test_rgb_to_hsl_part_7():
      """Test rgb to hsl color function"""
      assert rgb_to_hsl(153, 102, 102) == (0, 20, 50)
      assert rgb_to_hsl(204, 51, 51) == (0, 60, 50)
      assert rgb_to_hsl(255, 0, 0) == (0, 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 23 for calling a global function with example usage: test_rgb_to_hsl_part_7() without return types