Bone (#E3DAC9) and Spanish gray (#989898) appear together across 6 master palettes in our corpus, most prominently in the work of Felix Vallotton, Henri Manguin, and Alexander Rothaug and the Post-Impressionism tradition. Painters typically deployed bone at an average of 27% of the canvas, with spanish gray at 16%. Third colors most often completing the combination include Khaki (#C3B091), Shadow (#8A795D), and Raisin black (#242124).