palette = [ (0.4314, 0, 0.4314),
            (0.5569, 0, 0.4941),
            (0.6824, 0, 0.3686),
            (0.8078, 0, 0.2431),
            (0.8706, 0.1804, 0.1804),
            (0.9961, 0.3059, 0.0549),
            (0.9961, 0.4314, 0),
            (0.9961, 0.5569, 0),
            (0.9961, 0.6824, 0),
            (0.9961, 0.8078, 0),
            (0.9961, 0.9333, 0),
            (0.9961, 0.9961, 0),
            (0.9961, 0.9961, 0.9961) ]