Cerulean blue

A bright, deep blue of permanent pigment from cobalt stannate, its process was perfected in Germany in 1805 by a man named Hopfner. It was introduced in England in 1870 with the name of coeruleum, from the Latin word "caeruleum", meaning sky blue. Source: Ralph Mayer, "A Dictionary of Art Terms and Techniques".<br><br>A particular blue pigment.Related resource: Pigments through the Ages on cerulean blue.