Wildcolor

Color and pattern of the male

Head: dark reddish-brown.

Neck: hackle deep orange-red; each feather has a strong glossy black shaft-stripe, running almost parallel to the feather-edge, ends in a point near the tip; vein black; front of the neck black.

Back and shoulders: dark reddish-brown.

Saddle: hackle deep orange-red with shaft-stripe pattern.

Wings: black bow; green-glossy black wing-bar, forming a distinct band across the wing when closed.

Primary-flights: black, except for the outer-vane, which has a brown edge.

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

Breast: green-glossy black.

Belly, thighs and rear-part: black.

Down: greyish.

Serious faults

Far too light color in neck- and saddle-hackle. Far too weak shaft-stripe pattern. Broken shaft-stripe pattern.

Faults

The same deviations, but to a lesser extent. Incomplete colored wing-triangle.

Color and pattern of the female

Head: reddish-brown.

Neck: hackle reddish-orange on top, transitioning to dark-orange towards the bottom with a strong black shaft-stripe, running parallel to the feather-edge, ends in a point near the tip; front of neck salmon-colored.

Shoulders: reddish- brown, with a narrow fringe along the feather-edge, against which the black peppering is clustered, creating a crescent-shaped, blurred dark pattern on the feathers; the lighter vein contrasts clearly with the dark feather color.

Back, saddle-cushion and tail-coverts: similar to the shoulders.

Tail: steering-feathers black, except on the top two which are similar to the shoulders.

Wings: bow and wing-coverts similar to the shoulders.

Primary-flights: black.

Secondary-flights: inner-vane black, outer-vane reddish-brown with black peppering.

Breast: deep salmon reddish-brown.

Belly and thighs: slightly less darker then the wing-coverts.

Rear-part: reddish-brown.

Down: reddish-brown, slightly greyish. 

Serious faults

Far too light color of the breast. Far too light color of the wing-coverts, shoulder, back,  saddle-cushion and tail-coverts. The absence of the crescent-shaped color cluster. Far too light color of the hackle or the absence of the shaft-stripe pattern in the hackle-feathers. Broken shaft-stripe pattern.

Faults

The same deviations, but to a lesser extent.

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

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