Color and pattern male

Head: silvery white.

Neck- and saddle-hackle: silvery white, each feather with a broad bright blue shaft-stripe, running parallel to the edge, ends in a point near the tip, vein brigh-blue.

Front of the neck: bright-blue, each feather with silvery-white lacing, vein blue.

Back, shoulders and wing-bows: silvery white, somewhat interspersed with blue-grey, the blue-grey is at the base of the feather and is broadly laced.

Tail, wing-bar and flights: bright blue.

Breast: bright blue, each feather with a silvery-white lacing to top of thighs, vein bright-blue.

Thighs, belly and fluff: bright blue. 

Down: greyish-blue.

Color and pattern female

Head: silvery-white.

Neck-hackle: silvery-white, each feather with a broad bright-blue shaft-stripe, running parallel to the  edge ends  in a point near the tip..

Front of the neck: bright blue, each feather with a narrow, silvery-white lacing.

Back, saddle, tail and wings: bright blue.

Breast: bright blue, each feather with a narrow, silvery-white lacing to top of thighs.

Thighs, belly and fluff: bright blue.

Down: greyish-blue.

Serious faults male and female

Yellow tint in the silvery-white feather parts. Insufficient shaft-stripes in the hackles. Complete insufficient or too far downward lacing of the breast feathers.

Faults male and female

Minor deviations in color and pattern. Too pale, too dark or uneven blue. Total or partial black feathers.

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