Ecru (#C2B280) and Slate blue (#6A5ACD) appear together across 1 master palette in our corpus, most prominently in the work of Paul Jacoulet and the Post-Impressionism tradition. Painters typically deployed ecru at an average of 12% of the canvas, with slate blue at 16%. Third colors most often completing the combination include Royal blue (#002366), Manatee (#979AAA), and Burnt sienna (#E97451).