Rosso corsa (#D40000) and Smoky black (#100C08) appear together across 6 master palettes in our corpus, most prominently in the work of Marsden Hartley, Orazio Gentileschi, and Léo Schnug and the Abstract Art tradition. Painters typically deployed rosso corsa at an average of 19% of the canvas, with smoky black at 11%. Third colors most often completing the combination include Isabelline (#F4F0EC), St. Patrick's blue (#23297A), and Barn red (#7C0A02).