Khaki (#C3B091) and Sonic silver (#757575) appear together across 6 master palettes in our corpus, most prominently in the work of Gustave de Smet, Harry Phelan Gibb, and Ibrahim Calli and the Expressionism tradition. Painters typically deployed khaki at an average of 23% of the canvas, with sonic silver at 14%. Third colors most often completing the combination include Shadow (#8A795D), Spanish gray (#989898), and Eerie black (#1B1B1B).