These magnificent paints are designed to look and work just like traditional oil paint, but they're a bit special. You can use them without hazardous solvents - they're happy being thinned down and cleaned up with water. They're especially good for artists who share a workspace or don't want solvents in school or at home.
Cerulean Blue series 2, was developed in 1805 and entered the English market in the 1860s. Its name derives from the Latin Caeruleum meaning sky-blue pigment. It is a bright blue pigment with green undertones.
Transparency / Opacity SO