Color and pattern male

Head: rich buff each feather with a white middle-stripe, ends in a sharp point near the tip.

Neck: hackle rich buff , each feather with a strong white middle-stripe, running almost parallel to the edge, ends in a point near the tip; shaft buff ; front of the neck similar to the breast.

Back, shoulders and wingbows: rich buff, on the back some white lacing allowed. 

Wings: front buff with white lacing;  greater-coverts rich buff with a narrow, sharply defined, white lacing, forming a wing-bar when the wing is closed.

Primary-flights: white with a narrow buff lace on the outer-web.

Secondary-flights: outer-web base white, the other half buff with a white lace, which widens at the tip; inner-web white with a narrow buff lace.

Saddle-hackle: similar to the neck-hackle but each feather with a  rich buff elongated centre.

Tail: main-feathers white; sickles and greater-coverts white; smaller-coverts similar to the saddle-hackle but with a wider rich buff centre.

Breast, thighs and belly: each feather rich buff with a narrow, sharply defined, white lace.

Fluff: almost entire white with some yellow tinge.

Down: white.

Serious faults

Breaking through of the middle-stripe on the tip of hackle feathers. Uneven ground-color or a tint deviating from rich buff . Light shafts. Much too wide lacing. Narrow buff lace around the white lacing.  Poorly defined and interrupted lacing. Very irregular lacing. Much brown in the sickles. Complete white feathers on flanks and thighs. Black in wing-flights and tail main-feathers. Strongly deviating color from the white lace.

Faults

Serious faults to a lesser degree.

Color and pattern female

Head: rich buff.

Neck: rich buff, each white feather with a narrow, running around, buff lace; shaft golden-bay; front of the neck similar to the back.  

Back, shoulders, wing-coverts, breast thighs and belly: each feather rich buff with a narrow, sharply defined, white lace.

Primary-flights: white with a narrow buff lace on the outer-web.

Secondary-flights: outer-web base white, the other half  buff with a white lace which widens at the tip; inner-web white with a narrow buff lace.

Tail: main-feathers white, coverts rich buff with a white lace.

Fluff: almost entire white with some yellow tinge.

Down: white.

Serious faults

Breaking through of the middle-stripe on the tip of hackle feathers. Uneven ground- color or a tint deviating from rich buff. Light veins. Much too wide lacing. Narrow buff lace around the white lace.  Poorly defined and interrupted lace. Very irregular lace. Complete white feathers on flanks and thighs. Between the feather-groups strongly deviating lace-width. Black in wing-flights and tail main-feathers. Strongly deviating color from the white lace. Complete or partly black feathers. 

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