Berlin green

Wiktionary

1. n. Ferric ferricyanide; a complex cyanide with a structure similar to that of Prussian blue, used as a green dye.
2. n. A colour of oil paint thought to resemble the colour of the chemical.

GNU Webster's 1913

1. n. a complex cyanide of iron, used as a green dye, and similar to Prussian blue.
2. n. (Chem.) See under Berlin.