International orange (#BA160C) and Smoky black (#100C08) appear together across 6 master palettes in our corpus, most prominently in the work of Marsden Hartley, William Logsdail, and Teodor Axentowicz and the Abstract Art tradition. Painters typically deployed international orange at an average of 21% of the canvas, with smoky black at 11%. Third colors most often completing the combination include Copper (#B87333), Bistre (#3D2B1F), and Dark sienna (#3C1414).