Gold blue-birchen

Color and pattern male

Head: orange.

Neck- and saddle- hackle: orange-gold to light orange-gold; each feather with a broad, bright blue shaft stripe, running parallel to the feather edge; the shaft stripe ends in a point near the end of the feather.

Front of the neck: bright blue, each feather with an orange-gold edge, the vein of the feather is blue.

Back and shoulders: orange-golden yellow, slightly intermingled with blue-gray, the blue-gray is at the base of the feather and is broadly laced.

Tail and wings: all bright blue.

Breast: bright blue, each feather with an orange-gold lacing, the vein of the feather is blue; the lacing may not extend further down than to the upper part of the thighs.

Belly, thighs and rear-part: bright blue.

Down: grayish blue.

Color and pattern female

Head: orange.

Neck-hackle: orange-gold to light orange-gold, each feather with a broad bright blue shaft stripe, running parallel to the feather edge and ending in a point near the tip of the feather.

Front of the neck: bright blue, each feather with a narrow, orange-gold lacing.

Back, saddle, tail and wings: bright blue.

Breast: bright blue, each feather with a narrow, orange-gold lacing; the lacing should not extend below the start of the breastbone.

Belly, thighs and rear-part: bright blue.

Down: grayish blue.

Serious faults male and female

Straw-yellow color in the colored body feathers. Insufficient shaft stripe pattern in the male's neck- and saddle-hackle and in the female's neck-hackle. Totally insufficient or too far downward lacing of the breast feathers.

Faults male and female

Minor deviations in color and pattern. Too pale, too dark or uneven blue. Totally or partially black feathers.

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

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