code: def test_color_continuous():
      domain_values = [70, 75, 80, 85, 90, 95, 100]
  
      assert color_continuous(
          attr="value", domain=domain_values, colors="Peach"
      ).serialize() == {
          "@@function": "colorContinuous",
          "attr": "value",
          "domain": domain_values,
          "colors": "Peach",
          "nullColor": [204, 204, 204],
      }
  
label_desc: Use image node_id 3 for calling a global function with example usage: test_color_continuous() without return types