Cerulean blue - Definition

Cerulean blue is a cerulean (light blue or azure) pigment used in artistic painting. It is particularly valuable for painting atmospheric shades because of the purity of the blue (specifically the lack of greenish hues). The pigment is regarded as permanent: in oil, no other blue pigment retains color as well.

History

Discovered in 1805 by Andreas Höpfner, the pigment was first marketed in 1860 as "coeruleum" by George Rowney of the United Kingdom. The primary chemical constituent is cobalt (II) stannate.

Chemical name

Cobalt(II)-stannate

Color Coordinates

Hex triplet         =  #2A52BE
RGB    (r, g, b)    =  (41,82,190)
CMYK   (c, m, y, k) =  (58, 42, 0, 25)

See also

• Pigment
• Cerulean

External link

• A page on Cerulean Blue (http://webexhibits.org/pigments/indiv/overview/ceruleanblue.html)