Burnt sienna (#E97451) and Slate blue (#6A5ACD) appear together across 2 master palettes in our corpus, most prominently in the work of Paul Jacoulet and the Post-Impressionism tradition. Painters typically deployed burnt sienna at an average of 5% of the canvas, with slate blue at 8%. Third colors most often completing the combination include Royal blue (#002366), English violet (#563C5C), and Manatee (#979AAA).