Rublev Colours Artist Oils are unlike any other brand of oil paints today. How? One, we use genuine natural and historical pigments like those used by the old masters. Most of these pigments are not found in other brands. Second, we make Rublev Colours Artist Oils as they did before modern tube colors—without additives—they contain only pigment and oil. They are formulated to maintain the unique characteristics of each pigment in oil. The character found in each tube of our oil colors is unique due to the pigment inside, giving the artist new choices of texture, opacity, consistency, tone and hue.