Color and pattern male

Head: silver-white

Neck: hackle silver-white, each feather with a narrow, glossy green-black middle-stripe, running almost parallel to the edge ending in a point near the end; the upper-part is separated by a silver-white shaft; front of the neck black.

Back and shoulders: silver-white.

Saddle-hackle: silver-white, preferably without middle-stripes.

Tail: main-feathers black; sickles and coverts glossy green-black.

Wings: front black; wing-bar glossy green-black.

Primary-flights: black with a narrow, white edge on the outer-web.

Secondary-flights: inner-web and tip black, outer-web white forming a white wing-bay when the wing is closed.

Breast, belly and fluff: black predominantly with a narrow silver-white edging.

Down: dark grey.

Serious faults

Insufficient pattern on the breast. Excessively mottled breast. White wing-flights. Yellow tint in the hackles. Broken middle-stripes..

Faults

Serious faults to a lesser extent. Incomplete white wing-bay.

Color and pattern female

Head: silver-white.

Neck: hackle silver-white, each feather with a narrow, glossy green-black middle-stripe, running almost parallel to the edge ending in a point near the end; the upper-part is separated by a silver-white shaft; front of the neck black.

Back, shoulders, wing-coverts, saddle and thighs: even light grey ground-color with a fine, regularly distributed dark-grey peppering and a white shaft; each feather has a sharp, evenly widthwise, glossy silver-white flitter edge.

Primary-flights: dark-grey with a narrow greyish-white edge on the outer-web.

Secondary-flights: outer-web similar to the shoulders; inner-web greyish-white.

Tail: main-feathers dark-grey with light-grey pattern similar to the back.

Breast: salmon-colored, with some flitter permitted.

Fluff and down: dark-grey.

Serious faults

Broad or broken middle-stripes. Rust on wings. Excessively coarse peppering. Insufficient flitter. Yellowish tint in the neck-hackle.

Faults

Serious faults to a lesser extent.

Feather details from:  http://www.kippenencyclopedie.nl

Website from Johan Albada with more than

         5000 photos of chicken-breeds, chicken color varieties and feathers.     

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

Website from Henk Meijers with all available information regarding chicken genetics including the world famous 

Chicken Color Calculator