Cerulean (#007BA7) and Smoky black (#100C08) appear together across 6 master palettes in our corpus, most prominently in the work of Adolf Mosengel, Berény Róbert, and Karl Wilhelm Diefenbach and the Romanticism tradition. Painters typically deployed cerulean at an average of 2% of the canvas, with smoky black at 12%. Third colors most often completing the combination include White (#FFFFFF), Pine green (#2A2F23), and Teal blue (#367588).