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Related to iron blue: steel blue
iron blue[′ī·ərn ′blü]
Ferric ferrocyanide used as blue pigment by the paint industry for permanent body and trim paints; also used in blue ink, in paper dyeing, and as a fertilizer ingredient.
1. A class of deep blue pigments of ferric-ferrocyanides; tends to fade in light tints; reactive with alkalies; ferrocyanide blue.
2. Any color produced with Prussian blue, e.g., Chinese blue.