Bone (#E3DAC9) and Tourmaline (#86A1A9) appear together across 6 master palettes in our corpus, most prominently in the work of Moise Kisling, Charles Reiffel, and Boris Kustodiev and the Post-Impressionism tradition. Painters typically deployed bone at an average of 22% of the canvas, with tourmaline at 12%. Third colors most often completing the combination include Khaki (#C3B091), Shadow (#8A795D), and Quick Silver (#A6A6A6).