Chocolate

Color male and female

Overall upper plumage of a uniform deep dark brown color.

The male's decorative feathers are slightly glossy.

Down: brown

Serious faults

Uneven color, too dark or too light, and completely different colored feathers. Lack of any sheen.

Faults

The above serious faults occur to a lesser extent.

Genetic code: https://kippenjungle.nl/Overzicht.htm

Website with all available information regarding chicken genetics including the chicken color calculator.