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return {'red','red', 'blue','blue', 'green','green', 'yellow','yellow', 'fuchsia','fuchsia', 'aqua','aqua', 'brown','brown', 'orange','orange', 'purple','purple', 'sienna','sienna',
Excerpted from Wikipedia’s “Module:Plotter/DefaultColors” article, available under the CC BY-SA 4.0 licence.