Old mauve (#673147) and Rich black (#010203) appear together across 6 master palettes in our corpus, most prominently in the work of Mikhail Shibanov, Henry Mosler, and Abbott Handerson Thayer and the Realism tradition. Painters typically deployed old mauve at an average of 5% of the canvas, with rich black at 18%. Third colors most often completing the combination include Dark purple (#301934), Yale Blue (#00356B), and Marian blue (#00488B).