Cobalt Blue Hue is a clean blue pigment closely resembling Cobalt Blue. Genuine Cobalt was discovered in 1802 by French chemist Thénard as an alternative pigment to the expensive Lapis Lazuli blue.
Prussian Blue is a deep blue colour. It was made by German chemist Diesbach around 1704 making it the first synthetic blue pigment. It quickly gained favour as an alternative to genuine Ultramarine.
