Redpartridge

Color and pattern male

Head: golden-brown.

Neck: hackle golden-brown, lower hackle feathers with some black shaft-striping; front of neck black, some brown permitted.

Back: deep-red.

Tail: steering- and support-feathers black; sickles, by-sickles and coverts green-glossy black, the latter slightly brown-edged.

Saddle: hackle golden-brown, the feathers bordering the tail-coverts have some barely visible shaft-stripes.

Wings: bow feathers black; shoulders deep reddish-brown; wing-bar slightly violet-glossy black, with or without some brown speckles.

Primary-flights: black with a narrow brown edge along the outer-vane.

Secondary-flights:  inner-vane black with a slightly brown-peppered laced and brown speckles at the tips, outer-vane umber-brown, forming an umber-brown wing-triangle when the wing is closed.

Breast: black, visibly interspersed with reddish-brown.

Body: black with some brown interspersed.

Belly: dull-black, with or without some brown interspersed.

Thighs: dull-black, slightly more heavily interspersed with brown than the breast.

Rear-part: grey to pale-black with some brown peppering.

Down: greyish.

Serious faults

White in any part of the plumage. Red breast and strong shaft-stripe pattern.

Faults

Much brown or red in the breast, belly, and thighs. Slightly too much shaft-stripe pattern. Incomplete colored wing-triangle.

Color and pattern female

Head: golden-brown.

Neck: hackle from top to bottom changing from reddish-brown to light golden-brown with slightly interrupted blackish shaft-stripes with a golden center in the lower half of the hackle, black increasing slightly in intensity towards the bottom; front of neck similar to the breast.

Back and saddle-cushion: warm reddish-brown with blackish peppering without light edging.

Tail: steering-feathers dull-black, except for the two upper-feathers, which are speckled with dull-brown along the edges; coverts warm reddish-brown with slightly more blackish peppering than the back and saddle-cushion.

Wings: bow, shoulder, and coverts warm reddish-brown with blackish peppering without light edges.

Primary-flights: outer-vane black with yellow-brown speckles, inner-vane dull black, slightly speckled with brown at the tip.

Secondary-flights: outer-vane brown with black speckles, inner-vane more strongly peppered.

Breast: evenly salmon-colored brown-red.

Belly: salmon, fading to brown-grey towards the rear.

Thighs: salmon-brown. 

Rear-part: brown with grayish peppering.

Down: greyish.

Serious faults

White in any part of the plumage. Solid red feathers on shoulders and back. Too light ground-color.

Faults

Too red or too grey glow on shoulders, back, and saddle-cushion. Extensive shaft-pattern on the neck-hackle. Light veins.

Genetic code: https://kippenjungle.nl/Overzicht.htm

Website with all available information regarding chicken genetics including the chicken color calculator.