cobalt blue

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noun

a deep blue to a strong greenish-blue color.

any of a number of pigments containing an oxide of cobalt.

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Also called king's blue, Thenard's blue.

Origin of cobalt blue

First recorded in 1825–35

Words nearby cobalt blue

cobalamin, cobalt, cobalt 60, cobaltammine, cobalt bloom, cobalt blue, cobalt bomb, cobalt green, cobaltic, cobaltite, cobaltous

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use cobalt blue in a sentence

Then it found him: an obsessive, cobalt-blue-eyed Scot by the name of Alex Ferguson.
A Manchester United Fan Defends His Faith|Peter Pomerantsev|May 26, 2011|DAILY BEAST
And, just look at "all the cobalt-blue energy on the runways."
Royal Wedding Fever at London Fashion Week|Robin Givhan|February 22, 2011|DAILY BEAST
A mixture of cobalt blue and flowers of zinc with some yellow pigment.
Cooley's Cyclopdia of Practical Receipts and Collateral Information in the Arts, Manufactures, Professions, and Trades..., Sixth Edition, Volume I|Arnold Cooley
The rich cobalt blue, called bleu de roi, of which there were two varieties, the darker being designated gros bleu.
The Collector's Handbook to Keramics of the Renaissance and Modern Periods|William Chaffers

He walked down wearily and said: "Cobalt blue" to his own door after a furtive look up and down the hall.
The Syndic|C.M. Kornbluth
The decoration was painted in cobalt blue upon the unburned surface of the enamel.
The Potter's Craft|Charles F. Binns
A brilliant black may also be obtained by a mixture of cobalt blue with the oxides of manganese and iron.
A Dictionary of Arts, Manufactures and Mines|Andrew Ure

British Dictionary definitions for cobalt blue

cobalt blue

noun

Also called: Thénard's blue any greenish-blue pigment containing cobalt aluminate, usually made by heating cobaltous sulphate, aluminium oxide, and phosphoric acid together

a deep blue to greenish-blue colour
(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