Color and pattern male

Plumage: basicly similar to gold multiple laced black-partridge; feathers with cuckoo pattern dark-grey, three or four times crosswise interrupted by a light-grey slightly arched bar which is not sharply defined; in male ornamental feathers the number of crosswise bars is larger in proportion to the length the bars tends towards an inverted V; males are allowed in either purebred or impurebred where the difference is that the appearance of the purebred is clearly lighter than the female an the impurebred is similar to the female.

Head: orange-red.

Neck: hackle orange, each feather with a cuckoo pattern middle-stripe, no high demands on the sharpness and the intensity; front of the neck similar to the breast;

Back, shoulders and wing-bows: carmine-red, some cuckoo pattern visible.

Wings: front and wing-bar cuckoo pattern.

Primary-flights: cuckoo pattern with a narrow brown lace along the outer-web.

Secondary-flights: inner-web cuckoo pattern, outer-web brown, forming a brown wing-bay when the wing is closed.

Saddle-hackle: similar to the neck-hackle but a more or less distinct middle-stripe, absence is not considered a fault.

Tail, breast, thighs, belly and fluff: cuckoo pattern.

Down: grey.                                                                                        

Serious faults

Complete off-color feathers. White in wing-flights and tail.  Excessive brown in the breast, thighs and belly. Straw-yellow in the lower part of the neck-hackle. Too little cuckoo pattern in wings, tail and breast of impurebred.

Faults

Serious faults to a lesser degree Minor deviations in color and pattern. Incomplete colored wing-bay. Insufficient contrast between the light- and dark-grey bars in tail and wing-flights. Entire black feathers.

Color and pattern female

Plumage: basicly similar to gold multiple black-partridge, feathers with cuckoo pattern dark-grey, three or four times crosswise interrupted by a light-grey slightly arched bar which is not sharply defined. 

Head: golden-yellow.

Neck: hackle golden-yellow, each feather with a cuckoo middle-stripe, runs parallel to the outline, ends in a point near the tip, no high demands on the sharpness and the intensity; front of the neck similar to the breast.

Back, shoulders, wing-coverts, breast and saddle: each feather dark-grey multiple laced several times crosswise interrupted by a lighter-colored, slightly arched, smooth shading between dark and light bars.

Primary-flights: blackish-brown several times crosswise interrupted by a slightly lighter bar, smooth shading between dark and light bars.

Secondary-flights: outer-web similar to the back, inner-web similar to the primary-flights.

Tail: main-feathers similar to the primary-flights, coverts similar to the back.

Thighs, belly and fluff: similar t the breast.

Down: greyish.

Serious faults

Complete lack of cuckoo pattern on the neck-hackle. Shafts too light. Cuckoo pattern with to much contrast. Too little cuckoo-pattern on tail and wings. White on wing-flights. 

Faults 

Serious faults to a lesser degree. Too light ground-color on the neck-hackle.

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