Named after the famous RGB (Red, Green, Blue) coding system, these 2-in-1 tools combine the qualities of a colored pencil with a watersoluble 3B graphite lead to enable a variety of effects. Used dry, they retain the original properties of graphite. Used wet, the black is tinted with subtle shades of Carmine Lacquer, Dark Phthalo Green, and Prussian Blue for subtle colored washes. The end result is exceptionally lightfast.