Bone (#E3DAC9) and Charcoal (#36454F) appear together across 6 master palettes in our corpus, most prominently in the work of Shotei Takahashi, Toyen, and Friedrich Frank and the Meiji Period (1868–1912) tradition. Painters typically deployed bone at an average of 25% of the canvas, with charcoal at 12%. Third colors most often completing the combination include Khaki (#C3B091), Raisin black (#242124), and Shadow (#8A795D).