Eerie black (#1B1B1B) and Xanadu (#738678) appear together across 6 master palettes in our corpus, most prominently in the work of Albert Bierstadt, Julius Caesar Ibbetson, and Ilya Repin and the Romanticism tradition. Painters typically deployed eerie black at an average of 29% of the canvas, with xanadu at 11%. Third colors most often completing the combination include Ebony (#555D50), Drab dark brown (#4A412A), and Black olive (#3B3C36).