Color and pattern male

Head: mahogany-red.

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

Back and saddle-hackle: back mahogany reddish-brown; hackle mahogany-red, each feather similar to the neck-hackle; a slightly deeper shade in than in the neck-hackle is permitted, as much equality as possible is desired; vein black.

Tail: steering-feathers black, sickles, by-sickles and coverts green-glossy black; smaller-coverts mahogany-red laced.

Wings: bow black; shoulder-arch mahogany-red, greater-coverts green-glossy black forming a transverse wing-bar when the wing is closed. 

Primary-flights: black with a deep red-brown narrow lace along the outside of the outer-vane.

Secondary-flights: black with a deep mahogany-red lace along the outer-vane, forming a mahogany-red wing-triangle when the wing is closed, feather ends green-glossy black.

Breast: green-glossy black, some mahogany-red lacing permitted.

Belly, thighs and rear-part: black, some mahogany-red lacing permitted in thighs.

Down: slate blue.

Serious faults

White in tail and wing-flights. Much brown in breast. Yellowish glow in neck and saddle. 

Faults

The above faults occur to a lesser extent. Incomplete colored wing-triangle.

Color and pattern male

Head: warm reddish-brown.

Neck: hackle warm reddish-brown, starting approximately at the transition of head and neck, each feather with a broad green-glossy black shaft-stripe (slightly laced with warm reddish-brown), running parallel to the edge and ends in a point near the tip. Front of the neck similar to the breast.

Back: warm reddish-brown, sharpley black multiple laced, parallel to each other and to the feather outline.

Tail: steering-feathers black, both upper feathers black with warm reddish-brown pattern; coverts and saddle-cushion similar to the back.

Wing-coverts: similar to the back.

Primary-flights: black with a reddish-brown narrow lace on the outer-vane.

Secondary-flights: inner-vane black, outer-vane reddish-brown with black multiple lacing running approximately parallel to the feather-outline.

Breast: similar to the back; pattern continues to the throat.

Belly and  thighs: reddish-brown with black multiple lacing.

Rear-part: soft grey-brown.

Down: slate blue.

Serious faults

Too weak or incorrect pattern on the back, breast and wing-coverts. Too light reddish-brown. Peppered pattern instead of clear pattern.

Faults

The above faults occur to a lesser extent. 

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