Dark slate blue (#483D8B) and Permanent Geranium Lake (#E12C2C) appear together across 2 master palettes in our corpus, most prominently in the work of Azim Azimzade, and Aleksandra Ekster and the Art Nouveau tradition. Painters typically deployed dark slate blue at an average of 11% of the canvas, with permanent geranium lake at 11%. Third colors most often completing the combination include Floral white (#FFFAF0), Dark sienna (#3C1414), and Gainsboro (#DCDCDC).