Khaki (#C3B091) and Slate gray (#708090) appear together across 6 master palettes in our corpus, most prominently in the work of Alfred Wallis, Virginia Frances Sterrett, and Mily Possoz and the Medieval Art tradition. Painters typically deployed khaki at an average of 27% of the canvas, with slate gray at 10%. Third colors most often completing the combination include Middle grey (#8B8680), Shadow (#8A795D), and Bone (#E3DAC9).