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Cobalt Blue is a vibrant, rich pigment with a storied history. Jean-Antoine Chaptal (a minister appointed to first consul Napoleon Bonaparte) commissioned a chemist by the name of Louis Thénard to develop affordable blue colouring materials. Its sister pigment, Cobalt Blue Deep, was developed with a darker, red shade and powerful granulating properties. It has since become a popular choice among artists, known for its versatility, durability and rich colour. | Winsor & Newton