Color and pattern male

Head: lemon-yellow.

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

Back, shoulders, wing-arch, saddle-hackle and breast: glossy warm lemon-yellow.

Wing-bar: warm lemon-yellow, inner-web faintly transverse pencilled.

Primary-flights: inner-web bright greyish-blue, outer-web golden-yellow.

Secondary-flights: inner-web warm lemon-yellow bright greyish-blue transverse pencilled, outer-web golden-yellow except the tip where the pencilling continues.

Tail: steering-feathers bright greyish-blue; sickles and coverts bright greyish-blue with a narrow, sharply defined warm golden-yellow lacing.

Breast,flanks, thighs and belly: warm lemon-yellow, flanks show some bright greyish-blue pencilling.

Rear-part: bright greyish-blue with brown tinge..

Down: light blue-grey.

Note 

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

Serious faults

Uneven or too dark ground-color. Greyish-blue color too light. Too red on the shoulders. Too broad or very irregular lacing of sickles or tail-coverts. Absence of sickle lacing.

Faults

Serious faults to a lesser degree. Too dark on the back.

Color and pattern female

Head: warm lemon-yellow.

Neck: hackle warm lemon-yellow, some penciling allowed at base of the hackle; front of the neck similar to the breast, but slightly less strongly pencilled .

Back: warm lemon-yellow, each feather with bright greyish-blue fine straight tranverse pencilling, slightly wider than those of lemon-yellow.

Shoulders, wing-coverts and saddle: vibrantwarm lemon-yellow, each feather with bright greyish-blue fine straight tranverse pencilling, approximately as wide as those of lemon-yellow. 

Primary- and secondary-flights: warm lemon-yellow, with bright greyish-blue fine straight tranverse pencilling, slightly wider than as those of lemon-yellow.

Tail: steering-feathers warm lemon-yellow, each feather with bright greyish-blue fairly finely and straight transverse pencilling, slightly wider than as those of lemon-yellow; coverts warm lemon-yellow, each feather with bright greyish-blue fine straight tranverse pencilling, slightly wider than as those of lemon-yellow.

Breast, flanks and thighs: similar to the shoulders, pencilling on the breast should retain as much as possible towards the top and not fade out too strongly.

Belly and rear-part: warm lemon-yellow with bright greyish-blue pencilling or peppering.

Down: light blue-grey.

Serious faults

Uneven or too dark ground-color. Greyish-blue color too light. Coarse or very irregular pencilling. Insufficient colour depth and sharpness of the pencilling. Insufficient pencilling on the breast. Pencilling extending too high on the neck-hackle.

Faults

Serious faults to a lesser degree. Ground-color in the pencilling.

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