iron blue

/ˌaɪərn blu/

Other forms: iron blues

Definitions of iron blue

1. noun

   slightly purplish or bluish dark grey
   synonyms: Davy's gray, Davy's grey, steel gray, steel grey

   type of:

   gray, grayness, grey, greyness

   a neutral achromatic color midway between white and black
2. noun

   any of various blue pigments
   synonyms: Prussian blue

   type of:

   pigment

   dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)