code: def test_single_color_func_grey():
      # grey is special as it's a corner case
      random = Random(42)
  
      red_function = get_single_color_func("darkgrey")
      assert red_function(random_state=random) == "rgb(181, 181, 181)"
      assert red_function(random_state=random) == "rgb(56, 56, 56)"
  
imports: from wordcloud import WordCloud, get_single_color_func, ImageColorGenerator
  import numpy
  import pytest
  from random import Random
  from numpy.testing import assert_array_equal
  from PIL import Image
  import xml.etree.ElementTree
  import matplotlib
label_desc: Use image node_id 17 for calling a global function with example usage: test_single_color_func_grey() without return types