Color and pattern male

Head: lemon-yellow.

Neck: hackle glossy vibrant lemon-yellow; front of neck similar to the breast.

Back, shoulders, wing-bows and saddle-hackle: glossy lemon-yellow.

Wing-bar: glossy lemon-yellow, each feather with metallic glossy green-black tranverse pencilling, 3-4 times wider then those of lemon-yellow.

Tail: main-feathers black; sickles green-glossy black with a faint lemon-golden pencilling at the base, gradually diminishing towards the tip. 

Wing-flights: glossy lemon-yellow with strong transverse black pencilling, which become narrower towards the feather-tips.

Breast, thighs and belly: lemon-yellow, each feather with metallicglossy green-black tranverse pencilling, noticeably wider towards the fluff, feather-tip as dark as possible. 

Fluff: lemon yellow, black transverse pencilled.

Down: light blue-grey.

Note 

Hen-feathered males correspond entirely in color and pattern females.

Serious faults

Extensive pencilling in the hackles. Shoulder and wing-bow not sufficiently vibrant lemon yellow. Weak transverse pencilling throughout the plumage. Transverse pencilling on the upper breast to throat not rising high enough. Weak pencilling in the wing-flights. Complete insufficient sheen in black. Too light a shade in the neck- and saddle-hackle. Horseshoe pattern. Coloration that is much too light, much too dark or complete uneven. White in tail or wing-flights.

Faults

Serious faults to a lesser degree.

Color and pattern female

Head: lemon-yellow.

Neck: hackle lemon-yellow; front of neck similar to the breast.

Back, shoulders, saddle, wing-coverts: lemon-yellow, each feather with metallic glossy green-black tranverse pencilling, feather-tip as dark as possible. 

Wing-flights:  lemon-yellow with strong transverse black pencilling, gradually diminishing in strength towards the tips.

Tail: main-feathers lemon-yellow become darker towards the tip due to the gradually widening black transverse pencilling; coverts golden-lemon-yellow along their entire length black tranverse pencilled.

Breast, thighs and belly: lemon-yellow, each feather with metallic glossy green-black tranverse pencilling, noticeably wider towards the fluff, feather-tip as dark as possible. 

Fluff: lemon-yellow, black transverse pencilled.

Down: light blue-grey.

Serious faults

Extensive pencilling on the lower part of the hackle. Weak transverse pencilling throughout the plumage. Insufficient transverse pencilling on the upper-breast. Weak pencilling in the wing-flights. Far too few black pencilling in the tail-feathers. Color far too light, far too dark or complete uneven. White in tail or wing-flights.

Faults

Serious faults to a lesser degree.

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