The name Cerulean Blue comes from the Latin "caeruleum," and its original name in ancient days was Coeruleum--this color has been in use for a very long time. Winsor and Newton is well known for offering very high quality watercolors, and their version of Cerulean Blue stands out among paint manufacturer's offerings. W&N Cerulean Blue is a luscious sky blue opaque color. It is known for beautiful satiny, flocculating washes that provide lower color intensity than with some other colors, and among the major watercolor manufacturers has a more greenish (cyan) cast. Using cerulean blue as shadow against white gives a beautiful, very clean look. No version of Cerulean Blues tints other colors very well, but the W&N version blends better with other colors than any other brand. Cerulean blue can be a component in rich darks, combined best with burnt umber, burnt sienna, and venetian red/mars red.