Citron (#9FA91F) and International orange (#BA160C) appear together across 2 master palettes in our corpus, most prominently in the work of Morgan Russell and the Synchromism tradition. Painters typically deployed citron at an average of 10% of the canvas, with international orange at 12%. Third colors most often completing the combination include Wine (#722F37), Raisin black (#242124), and Air superiority blue (#72A0C1).