Copper penny (#AD6F69) and Purple navy (#4E5180) appear together across 6 master palettes in our corpus, most prominently in the work of Georges Braque, Jeanne Hébuterne, and Vladimir Baranov-Rossiné and the Expressionism tradition. Painters typically deployed copper penny at an average of 14% of the canvas, with purple navy at 5%. Third colors most often completing the combination include Lapis lazuli (#26619C), Silver pink (#C4AEAD), and Bone (#E3DAC9).