Cobalt blue
Blue pigment / From Wikipedia, the free encyclopedia
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This article is about the color. For other uses, see Cobalt blue (disambiguation).
Cobalt blue is a blue pigment made by sintering cobalt(II) oxide with aluminium(III) oxide (alumina) at 1200 °C. Chemically, cobalt blue pigment is cobalt(II) oxide-aluminium oxide, or cobalt(II) aluminate, CoAl2O4. Cobalt blue is lighter and less intense than the (iron-cyanide based) pigment Prussian blue. It is extremely stable and historically has been used as a coloring agent in ceramics (especially Chinese porcelain), jewelry, and paint. Transparent glasses are tinted with the silica-based cobalt pigment "smalt".
Quick Facts Color coordinates, Hex triplet ...
Cobalt blue | |
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Color coordinates | |
Hex triplet | #0047AB |
sRGBB (r, g, b) | (0, 71, 171) |
HSV (h, s, v) | (215°, 100%, 67%) |
CIELChuv (L, C, h) | (33, 82, 259°) |
Source | [Unsourced] |
ISCC–NBS descriptor | Vivid blue |
B: Normalized to [0–255] (byte) |
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Quick Facts Identifiers, Properties ...
Identifiers | |
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3D model (JSmol) |
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Properties | |
Al2CoO4 | |
Molar mass | 176.892 g·mol−1 |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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