Azo Yellow is a brilliant primary yellow less opaque than Cadmium Yellow Light. More lightfast than Hansa Yellow. Pigment Composition: Benzimidazolone Yellow PY151 Lightfast Rating: Excellent Opacity Rating: Semi Transparent M. Graham acrylic artists’ color are made with the same devotion and craftsmanship that they use in their traditional media: small batches, quality ingredients, and the highest concentrations of color possible. The flow and delicacy of a gouache, with colors you’d expect from oil. The result is fine art acrylic paint with bold vitality and a creamy delicacy of touch that offers you a world of opportunity — from fine detail to broad, full-brushed applications