Titanium White Cobra Study Water Mixable Oil Colour in a 40ml tube is a paint that offers the results of traditional oil paint with the convenience of water clean-up. Solvents are not needed, so you can paint anywhere! Clean brushes with soap and water. Cobra Study colors have the highest degree of lightfastness and do not significantly shift color over time. Affordably priced and better for the environment, while behaving like traditional oil color.