Color and pattern male and female

Silver-white ground- color, each feather with a narrow glossy black lacing, evenly spaced, running complete around the feather and visible at the front and back of the feather.

Down blue-gray.

Serious faults

A yellowish tint in the ground-color. Broad or insufficienty deep-black lacing. Double lacing. Horseshoe-shaped lacing. Insufficient lacing on the breast and front of the neck. Unlaced throat. Black peppering on the tail.

Faults

Serious faults occur to a lesser degree.

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