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Cobalt Blue is a clean blue pigment. It was discovered in 1802 by French chemist Louis Thénard as an alternative pigment to the expensive Lapis Lazuli blue pigment.
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Write a reviewBought Winsor and Newton cobalt blue as my other W/N colours are so good. The cobalt blue in my palette is a different pigment (and brand) and is more like ultra marine blue. My skies are much better and my greens look more natural. Winsor and Newton watercolour paints are worth every penny.