cobalt
//ˈkoʊ.bɔːlt//
Noun
1
A hard, lustrous, silver-gray metallic chemical element with the symbol Co and atomic number 27, used in alloys and to produce blue pigments.
Cobalt is used to make blue pigments for ceramics and glass.
2
A deep blue color resembling the pigment made from cobalt compounds.
She painted the sky in a beautiful cobalt.