Abstract: Pigmentary compositions consisting essentially of a crystalline, light-stable nickel chelate of 1-nitroso-2-naphthol and from about 0.15 to about 2 parts per part of the anhydrous nickel chelate of certain fatty acids and/or their salts are described. The compositions are produced by treating the hydrated nickel chelate of 1-nitroso-2-naphthol in aqueous medium at a pH of about 3.5 to about 5 with the fatty acid and/or its salt, isolating the treated chelate and then heating the isolated product at about 75.degree. to about 115.degree. C. until dehydration is complete and the chelate is converted to its crystalline, light-stable form.