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cobalt blue

noun
1.
a deep blue to a strong greenish-blue color.
2.
any of a number of pigments containing an oxide of cobalt.
Also called king's blue, Thenard's blue.
Origin
1825-1835
1825-35
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for cobalt-blue

cobalt blue

noun
1.
Also called Thénard's blue. any greenish-blue pigment containing cobalt aluminate, usually made by heating cobaltous sulphate, aluminium oxide, and phosphoric acid together
2.
  1. a deep blue to greenish-blue colour
  2. (as adjective): a cobalt-blue car
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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