Cobalt Violet Deep is a charming purple that brings texture and depth to any painting. In washes you will see subtle tones, while at full strength this colour is rich and bold with a velvety finish.; Sennelier gathers only the finest organic and inorganic pigments from around the world. These pure pigments are ground very slowly with extreme care to an extra-fine consistency. They are then combined at maximum concentration with an archival safflower oil to yield the highest possible tinting strength and a rich satin finish. This paint has a unique buttery texture.