Ultramarine is a rich deep transparent blue. It was created by French chemist Guimet in 1828 as a synthetic but chemically identical replacement for the expensive pigment derived from Lapis Lazuli.
Our popular Cotman Watercolours come in 48 colours. They are made with fine art pigments so are uncompromising on quality with good tinting strength. Available individually or in a variety of sets for all needs.