Bone (#E3DAC9) and Light slate gray (#778899) appear together across 6 master palettes in our corpus, most prominently in the work of Ignacio Merino, Louis Glackens, and Maurice Prendergast and the Art Nouveau tradition. Painters typically deployed bone at an average of 13% of the canvas, with light slate gray at 8%. Third colors most often completing the combination include Shadow (#8A795D), Khaki (#C3B091), and Silver chalice (#ACACAC).