Dark slate blue (#483D8B) and Khaki (#C3B091) appear together across 6 master palettes in our corpus, most prominently in the work of Giotto, Tarsila do Amaral, and Louis Hayet and the Post-Impressionism tradition. Painters typically deployed dark slate blue at an average of 17% of the canvas, with khaki at 5%. Third colors most often completing the combination include Shadow (#8A795D), Silver sand (#BFC1C2), and Raisin black (#242124).