code: def test_add_graph_with_node_color_as_string(node_color):
      """Tests for ``display.add_graph()``."""
      lzry_projector = LZRYProjector(cut_coords=(0, 0, 0, 0))
      matrix = np.array([[0, 3], [3, 0]])
      node_coords = [[-53.60, -62.80, 36.64], [23.87, 0.31, 69.42]]
      lzry_projector.add_graph(
          matrix, node_coords, node_color=node_color
      )
      lzry_projector.close()
  
imports: import matplotlib
  import matplotlib.pyplot
  import numpy
  import pytest
  from nibabel import Nifti1Image
  from nilearn.datasets import load_mni152_template
  from nilearn.plotting.displays import BaseAxes, LProjector, LRProjector, LYRProjector, LYRZProjector, LZRProjector, LZRYProjector, MosaicSlicer, OrthoProjector, OrthoSlicer, RProjector, TiledSlicer, XProjector, XSlicer, XZProjector, XZSlicer, YProjector, YSlicer, YXProjector, YXSlicer, YZProjector, YZSlicer, ZProjector, ZSlicer
label_desc: Use image node_id 23 for calling a global function with example usage: test_add_graph_with_node_color_as_string(node_color) without return types