Brassy-back
Color and pattern male
Head and neck: black, some brown in the hackle is permitted.
Back and shoulders: black with brass mixing.
Saddle-hackle: black with a blurred brass feather-edge.
Tail: black, some white at the base of the main-sickles is permitted.
Primary-flights: black.
Secondary-flights: black, some blurry brass marking in the outer-vane is permitted.
Breast: green-glossy black
Belly, thighs and rear-part: black
Down: grey
Serious faults
Clearly visible shaft-stripe pattern on the head and neck. Marking in the primary-flights. Extensive marking in the outer-vane of the secondary-flights.
Faults
Serious faults occur to a lesser extent. Too yellow or too light ground-color on the back and shoulders. Excessive white in the tail.
Color and pattern female
Head and neck: black, some brown in the hackle is permitted; front of the neck similar to the breast.
Back, wing-coverts and saddle: black with a brass vein and a creamy to blurred brownish feather-edge is permitted.
Tail: black.
Primary-flights: black.
Secondary-flights: preferably entirely black but may show some brown blurred marking or a brownish-black haze on the outer-edge.
Breast: cream to light brown in the center; towards the outside mixed with some black; veins are lighter tinted and clearly distinguishable.
Belly, thighs and rear-part: cream to light brown with some black mixing.
Down: grey
Serious faults
Clearly visible shaft-stripe pattern on the head and neck. Extensive marking in the secondary-flights. Marking in the primary-flights. Blurred feather-edging on back, saddle and wing-coverts.
Faults
Serious faults occur to a lesser extent. Complete lack of the blurred brown vein on the back, saddle and wing-coverts.
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
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