Copper (#B87333) and Olivine (#9AB973) appear together across 6 master palettes in our corpus, most prominently in the work of Othon Friesz, and Giorgio de Chirico and the Post-Impressionism tradition. Painters typically deployed copper at an average of 5% of the canvas, with olivine at 7%. Third colors most often completing the combination include Prairie gold (#E1CA7A), Eerie black (#1B1B1B), and Artichoke green (#4B6F44).