Bone (#E3DAC9) and Slate gray (#708090) appear together across 6 master palettes in our corpus, most prominently in the work of Arthur Lismer, Franz Marc, and Vilhelms Purvitis and the Art Nouveau tradition. Painters typically deployed bone at an average of 25% of the canvas, with slate gray at 9%. Third colors most often completing the combination include Khaki (#C3B091), Raisin black (#242124), and Quick Silver (#A6A6A6).