- any of a group of dark-blue powders, ferrocyanides of iron, used as dyes or pigments; esp., ferric ferrocyanide, Fe[Fe(CN)]
- a strong, dark blue
Origin of Prussian blueorigin, originally discovered in Prussia (1704)
- An insoluble dark blue pigment and dye, ferric ferrocyanide or one of its modifications.
- See iron blue.
- A moderate to strong blue or deep greenish blue.
Origin of Prussian blueFrom its having been discovered by an 18th-century color-maker in Berlin (then in Prussia).
(plural Prussian blues)
(comparative more Prussian blue, superlative most Prussian blue)
- Of a rich blue colour, tinted with green.
The pigment was discovered circa 1700 in the German state of Prussia by a paint-maker named Diesbach.