code: def test_contours_color_op(self):
      contours = Contours(
          [
              {("x", "y"): [(0, 0), (0, 1), (1, 0)], "color": "green"},
              {("x", "y"): [(1, 0), (1, 1), (0, 1)], "color": "red"},
          ],
          vdims="color",
      ).opts(color="color")
      plot = mpl_renderer.get_plot(contours)
      artist = plot.handles["artist"]
      colors = np.array(
          [[0.0, 0.501961, 0.0, 1.0], [1.0, 0.0, 0.0, 1.0]]
      )
      self.assertEqual(artist.get_edgecolors(), colors)
  
imports: import numpy
  import pytest
  from holoviews.core import NdOverlay
  from holoviews.core.options import AbbreviatedException
  from holoviews.core.spaces import HoloMap
  from holoviews.element import Contours, Path, Polygons
  from .test_plot import TestMPLPlot, mpl_renderer
label_desc: Use image node_id 2 for calling the TestContoursPlot obj's underlying member method code with example usage: obj.test_contours_color_op() without return types