Dark-silverpartridge

Color and pattern male

Head: light silvery-gray

Neck: hackle silvery-white or light straw-yellow, each feather has a green-glossy black shaft-stripe running parallel to the feather-edge, the shaft-stripe ends in a point near the tip; front of the neck black.

Shoulders and back: light straw-yellow or silvery-white interspersed with black or grey.

Saddle: hackle silvery-white or light straw-yellow with black shaft-stripes.

Tail: steering-feathers black; sickles, by-sickles, and coverts green-glossy black; some white in the large sickles is permitted.

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

Primary-flights: black with a narrow white edge along the outer- vane.

Secondary-flights: inner-vane black, outer-vane white, forming a white wing-triangle when the wing is closed.

Breast: green-glossy black.

Belly, thighs and rear-part: black.

Down: greyish.

Serious faults

Rusty brown or red on the shoulders. Extensive white on the breast, belly and thighs. White in the tail steering-feathers.

Faults

The above serious faults occur to a lesser extent. Insufficient sharply defined neck- and saddle-hackle. Incomplete white wing-triangle.

Color and pattern female

Head: black.

Neck: hackle silvery-white or light straw-yellow, strongly striped with black or grey; front of neck dark salmon-red.

Wings: bow, shoulders, and coverts black, interspersed with dark brownish-grey in the center of the feathers; feather-shafts dull-white or straw-yellow.

Primary-flights: feathers grey-brown.

Secondary- flights: outer-vane black, inner-vane black interspersed with dark-grey.

Back: slightly darker than the wing-coverts, almost black; feather-shafts dull-white or straw-yellow.

Tail: steering-flights dark-brown with grey peppering; coverts similar to the back.

Breast: dark salmon-colored, each feather edged with black at the base, the edging increasing slightly toward the sides of the breast; feather-shafts light-brown.

Body: black interspersed with grey; down dull-black with grey.

Lower thighs: dark-grey with brown.

Down: dark-grey.

Serious faults

Too weak striped neck-hackle. Too light breast-color and/or absence of pattern on the breast. Different color of the feather-shafts.

Faults

The above serious faults occur to a lesser extent.

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

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