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cobalt

adjective
 
 
/ˈkəʊ.bɒlt/ US  /ˈkoʊ.bɑːlt/ (also cobalt blue)

Definition

having a deep blue or greenish-blue colourLess common coloursCommon colours
(Definition of cobalt adjective from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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