iron blue

Noun
  1. Slightly purplish or bluish dark grey (synset 114947198)
    is a type of: gray, grayness, grey, greyness - a neutral achromatic color midway between white and black
    same as: davy's gray, davy's grey, steel gray, steel grey
  2. Any of various blue pigments (synset 114947098)
    is a type of: pigment - dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)
    same as: prussian blue

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