Bone (#E3DAC9) and Copper red (#CB6D51) appear together across 6 master palettes in our corpus, most prominently in the work of Jacek Malczewski, Giovanni Costa, and Josef Capek and the still life tradition. Painters typically deployed bone at an average of 31% of the canvas, with copper red at 9%. Third colors most often completing the combination include Khaki (#C3B091), Raisin black (#242124), and Camel (#C19A6B).