Definition of Guignet's green
1
: a bluish green pigment of good brilliance and permanence consisting of a hydrated chromic oxide made by fusion of sodium dichromate and boric acid and hydrolysis of the product
2
: a dark bluish green that is greener and stronger than average teal green and greener, lighter, and stronger than invisible green (see invisible green 2) — called also
Mittler's green
