Isabel-partridge

Color and pattern of the male

Head: isabel-yellow.

Neck: from top to bottom changing from isabel-yellow to light isabel-yellow; each feather with a lavender shaft-stripe, runs parallel to the outline, ends in a point near the tip, no high demands on the sharpness and the intensity; front of the neck lavender.

Back, shoulders and wing-arch: light isabel-yellow.

Saddle-hackle: isabel-yellow to light isabel-yellow; each feather with a more or less distinct lavender shaft-stripe, absence is not considered a fault; a slightly deeper tint than in the neck-hackle is permitted, equality is desired. 

Tail: steering-feathers, sickles and coverts lavender.

Wings: bow and wing-bar lavender.

Primary-flights: lavender with a narrow cream edge along the outer-vane.

Secondary-flights: inner-vane lavender, outer-vane cream, forming a cream wing-triangle when the wing is closed.

Breast, belly, thighs and rear-part: lavender.

Down: silvery-lavender.

Serious faults

White in sickles, tail and wing-flights. Much isabel-yellow in the breast, belly and thighs. Too light color in the lower part of the neck-hackle. Too light isabel-yellow resulting in a lack of contrast with lavender. Absence of shaft-stripes on the neck-hackle.

Faults

Minor deviations in color and pattern. Insufficient sharply defined neck- and saddle-hackle. Incomplete colored wing-triangle.

Color and pattern of the female

Head: isabel-yellow.

Neck: hackle isabel-yellow, each feather with a lavender shaft-stripe, runs parallel to the outline, ends in a point near the tip, no high demands on the sharpness and the intensity; front of the neck similar to the breast.

Back, shoulders, bow, wing-coverts and saddle: each feather isabel-gray with fine evenly distributed lavender peppering, as few  light-colored veins as possible; slightly light lacing permitted but not desired.

Primary-flights: lavender with a narrow isabel-yellow outer-vane.

Secondary-flights: outer-vane similar to the back; inner-vane isabel-grey.

Tail: lavender steering-feathers except for the upper ones, which like the coverts are similar to the back.

Breast: light-salmon, transitioning to isabel-grey at the thighs, veins light-salmon.

Belly, thighs and rear-part: greyish.

Down: silvery-lavender.

Serious faults

Too light isabel-yellowr, resulting in a lack of contrast with lavender. Absence of shaft-stripes. Light veins, clearly lighter than isabel-yellow. Excessive coarse or clumped peppering.

Faults

Minor deviations in color and pattern. Insufficient sharply defined neck-hackle. Slightly clumped peppering and/or light veins on the breast.

Feather details from:  http://www.kippenencyclopedie.nl

Website from Johan Albada with more than

         5000 photos of chicken-breeds, chicken color varieties and feathers.       

 

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