Black olive (#3B3C36) and Columbia Blue (#B9D9EB) appear together across 5 master palettes in our corpus, most prominently in the work of Carle Vernet, Friedrich Ernst Wolperding, and Angelo Inganni and the Romanticism tradition. Painters typically deployed black olive at an average of 18% of the canvas, with columbia blue at 10%. Third colors most often completing the combination include Isabelline (#F4F0EC), Smoky black (#100C08), and Ash gray (#B2BEB5).