And thats not all. Working with artists around the world confirmed that above all else, acrylic artists want the brightest, most vivid colors that do not change as they dry. Paynes Gray is a dark blue grey made from a mixture of Ultramarine, Mars Black and sometimes Crimson. It was named after the 18th c. watercolorist William Payne who created the mixture and often recommended it to his students as an alternative to plain black. 75oz/200ml tube of Winsor & Newton Professional Acrylic Color Conforms to ASTM D4236.