cobalt blue definition

  • noun:
    • A blue to green pigment comprising a variable blend of cobalt oxide and alumina.
    • A moderate to deep brilliant azure or greenish-blue.
    • a-deep blue pigment produced from cobalt; zaffre
    • a dark blue pigment comprising some salt of cobalt, as the phosphate, ignited with alumina; -- labeled as additionally cobalt ultramarine, and Thenard's blue.
    • greenish-blue pigment consisting basically of cobalt oxide and alumina
    • a shade of blue tinged with green
  • adjective:
    • The color associated with the pigment zaffre.

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