Copper-neck

Color and pattern male and female

Body-plumage: matte-black.

Neck-hackle: black laced with copper-red.

Saddle-hackle male: black laced with copper-red.

Breast color: matte-black or matte-black with some copper-red pattern.

Back and shoulders male: copper-red.

Down: dark-grey.

Serious faults in male and female

All-white feathers. Very glossy plumage. Copper-yellow instead of copper-red hackle.

Faults in male and female

The above serious faults occur to a lesser extent. Too little copper-red pattern on the neck-hackle.

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

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