code: def show_graphviz_custom_colors(pipeline: Pipeline):
      """Show with graphviz with custom colors (requires Graphviz and pygraphviz)."""
      pipeline.show(
          engine="graphviz",
          node_color={
              "scaling": "tab:olive",
              "rf": "#FF7F50",
              "linear": (0, 1, 1),
              None: "black",
          },
      )
  
file_path: FEDOT/examples/simple/pipeline_visualization.py
imports: from golem.core.log import default_log
  from fedot.core.pipelines.node import PipelineNode
  from fedot.core.pipelines.pipeline import Pipeline
  from fedot.core.pipelines.pipeline_builder import PipelineBuilder
label_desc: Use image node_id 9 for calling a global function with example usage: show_graphviz_custom_colors(pipeline) without return types