Cobalt Violet: Deep violet that is cool in its masstone (and less red than Manganese Violet), Cobalt Violet is a pure hue that cannot be mixed from other colors. Although very muted in its tint, it is a marvel as a top coat color. Cobalt Violet greys down considerably when mixed with white.

Pigment: Cobalt phosphate (PV 14)
Vehicle: Alkali refined linseed oil
Lightfastness I, Series 6, SEMI-TRANSPARENT

reference: www.gamblincolors.com