Lemonpartridge

Color and pattern of the male

Head: warm-orange.

Neck: hackle gradually transitions from light-orange to golden-yellow from top to bottom, each feather has a black shaft-stripe, no stringent requirements are placed on the sharpness of the pattern and the intensity of the shaft-stripe, as far as present it ends in a point near the tip; front of the neck black.

Shoulders: warm-orange.

Back: warm-orange.

Saddle: hackle ranges from light-orange to golden-yellow with more or less distinct shaft-stripe pattern; the absence of hackle pattern is not considered a fault.

Tail: black steering-feathers; sickles, by-sickles, and tail-coverts green-glossy black.

Wings: black bow; wing-bar green-glossy black.

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

Secondary-flights: black inner-vane; outer-vane cream, transitioning to light-brown towards the tip, so that when the wing is closed, the wing-triangle is almost entirely cream with a visible light-brown lace on the upper-side.

Breast: green-glossy black.

Belly, thighs and rear-part: black.

Down: greyish.

Serious faults

Too light or too dark color in the neck-hackle (the so-called floaters). White in sickles, tail and wing-flights. Excessive brown in the breast, belly and thighs.

Faults

Other, minor deviations in color and pattern. Too light or too dark color. Silvery-white wing-triangle.

Color and pattern of the female

Head: yellow.

Neck: hackle yellow; each feather has a black shaft-stripe; the sharpness of the pattern and the intensity of the shaft-stripe are not high demands;  the shaft-stripe runs parallel to the feather-edge and ends in a point near the tip; front of the neck salmon-brown.

Shoulders, back, and saddle-cushion: grayish-yellow with small, evenly distributed greyish-black peppering.

Tail: black steering feathers, except for the upperl-coverts, which, like the coverts, are greyish-yellow with small black speckles.

Wings: bow, wing-bar, and coverts similar to the shoulders.

Primary-flights: blackish-grey with a narrow greyish-yellow outer-vane.

Secondary-flights: outer-vane similar to the shoulders, inner-vane blackish-grey.

Breast: salmon-orange, veins of the same color, fading to yellowish-grey at the thighs.

Belly, thighs and rear-part: yellowish-gray.

Down: greyish.

Note

A slightly lighter edging on the back and wing-coverts permissible but not desirable.

Serious faults

Too light or too dark color on the neck-hackle (so-called hoverflies). Too red (rusty) on the shoulders. Too pale breast color. Complete absence of the shaft stripe pattern. Light veins on the neck-hackle and shoulders. Excessively coarse or clumped peppering.

Faults

Other, minor deviations in color and pattern. Color too light or too dark. Slightly clumped peppering and light veins on the breast.

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

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