Winsor & Newton Artists' Oil Color is unmatched for its purity, quality and reliability - a success which is reflected in its world-wide reputation amongst professional artists. Every Winsor & Newton Artists' Oil Color is individually formulated to enhance each pigment's natural characteristics and ensure stability of color. By exercising maximum quality control throughout all stages of manufacture, selecting the most suitable drying oils and method of pigment dispersion, the unique individual properties of each color are preserved. Combined with over 180 years of manufacturing and quality control expertise, the formulation of Artist's Oil Color ensures the best raw materials are made into the World's Finest Colors. Winsor Violet (Dioxazine) is a vivid mid-shade purple pigment. When undiluted, it can be used as a deep black. It is a transparent coal tar pigment and was introduced into the Winsor & Newton range in the 1960s.