Bone (#E3DAC9) and Shadow blue (#778BA5) appear together across 6 master palettes in our corpus, most prominently in the work of Vladimir Baranov-Rossiné, Theo van Rysselberghe, and Vilmos Aba-Novak and the Cubo-Futurism tradition. Painters typically deployed bone at an average of 19% of the canvas, with shadow blue at 10%. Third colors most often completing the combination include Khaki (#C3B091), Raisin black (#242124), and Middle grey (#8B8680).