“The unique mustard color surprises you with stunning gold undertones, and bright primrose yellow in the tints. Cooler than other Transparent yellows.” “Nickel Complex Azomethine (PY 150) is a chemical cousin to Williamsburg’s Green Gold, which is a Copper Complex of Azomethine. Like Green Gold, Nickel Azo Yellow has a similarly dynamic color quality. A difficult color to pin down, its almost angle-dependent masstone seems to shift from slight greenish brown to a nut-like orangish-tan. This color is strikingly different in masstone from the undertone and tint. When scraped thin it is an absolutely stunning brilliant yellow which can be scumbled onto the surface without the additions of medium, as a chromatic golden veil or used in glazes to saturate and warm up an underpainting. When added to white it turns to a unique mustard yellow, similar to the colonial yellows used on houses and primitive furnishings. Cooler than any other Transparent yellow, including Cobalt Yellow and Transparent Yellow Iron Oxide.” -Just Paint 2018 -Williamsburg