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cobalt vs. royal blue

[ koh-bawlt ]
  1. a silver-white metallic element with a faint pinkish tinge, occurring in compounds whose silicates afford important blue coloring substances for ceramics. Symbol: Co; atomic weight: 58.933; atomic number: 27; specific gravity: 8.9 at 20°C.
  1. a deep blue, often with a faint reddish tinge.

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