Dark slate blue (#483D8B) and Eerie black (#1B1B1B) appear together across 6 master palettes in our corpus, most prominently in the work of Jock Macdonald, Odilon Redon, and Mikhail Larionov and the Surrealism tradition. Painters typically deployed dark slate blue at an average of 23% of the canvas, with eerie black at 10%. Third colors most often completing the combination include USAFA blue (#004F98), Timberwolf (#DBD7D2), and Space cadet (#1D2951).