Prussian blue

The pigment was discovered circa 1700 in the German state of Prussia by a paint-maker named Diesbach.

Prussian blue (countable and uncountable, plural Prussian blues)

1. (inorganic chemistry) An insoluble dark, bright blue pigment, ferric ferrocyanide (equivalent to ferrous ferricyanide), used in painting and dyeing, and as an antidote for certain kinds of heavy metal poisoning.
2. A moderate to rich blue colour, tinted with deep greenish blue.

   Prussian blue:  

A sample of Prussian blue (potassium ferrous ferricyanide) pigment

• Berlin green
• Prussian red

Prussian blue (comparative more Prussian blue, superlative most Prussian blue)

1. Of a rich blue colour, tinted with green.

• (colour): Berlin blue, bronze blue, celestial blue, cyanine, Haarlem blue, Hamburg Blue, iron blue, oriental blue, Paris Blue, potash blue, Turnbull's blue

• (blues) blue; Alice blue, aqua, aquamarine, azure, baby blue, beryl, bice, bice blue, blue green, blue violet, blueberry, cadet blue, Cambridge blue, cerulean, cobalt blue, Copenhagen blue, cornflower, cornflower blue, cyan, dark blue, Dodger blue, duck-egg blue, eggshell blue, electric blue, gentian blue, ice blue, lapis lazuli, light blue, lovat, mazarine, midnight blue, navy, Nile blue, Oxford blue, peacock blue, petrol blue, powder blue, Prussian blue, robin's-egg blue, royal blue, sapphire, saxe blue, slate blue, sky blue, teal, turquoise, ultramarine, Wedgwood blue, zaffre ^{(Category: en:Blues)}
• Prussian red