Color and pattern male

Head: silvery-white.

Neck, back, shoulders, wing-bows and saddle-hackle: silvery-white, each feather ending in an elongated sharply pointed lavender spangle, proportional in size to the feather.

Tail: feathers both inside and outside silvery-white white with lavender spangles, proportional in size to the feather.

Wing-bars: silvery-white, each feather ending in a large, almost round, lavender spangle, resulting in two distinct bars across the wing.

Wing-flights: white, each feather ending in a lavender spangle.

Breast: silvery-white, each feather ending in a large, almost round, lavender spangle, sized to create a uniform sufficiently open pattern.

Thighs and belly: similar to the breast,but the feathering below is predominant lavender below.

Fluff: lavender with white tinge.

Down: light lavender.

Serious faults

Yellow tint in the ornamental feathers. Clearly visible peppering in the tail. Few or insufficient spangles in the hackles. Insufficient spangles at the ends of the sickles or wing-bows. Partial or entire black tail coverts. Excessive heavy, excessive light or crescent-shaped spangles on the breast, thighs and belly. 

Faults

Serious faults to a lesser extent.

Color and pattern female

Head: silvery-white, with lavender markings.

Neck: silvery-white,each feather ending in a elongated lavender spangle; front of the neck similar to the breast.

Back, shoulders, smaller wing-coverts and saddle: silvery-white, each feather ending in a large, almost round, lavender spangle, proportional in size to the feather.

Tail: feathers both inside and outside silvery-white white with lavender spangles, proportional in size to the feather.

Wing-bars: silvery-white, each feather ending in a large, almost round, lavender spangle, resulting in two distinct bars across the wing.

Wing-flights: silvery white, each feather ending in a lavender spangle.

Breast: silvery white, each feather ending in a large, almost round lavender spangle, sized to create a uniform, sufficiently open pattern.

Thighs and belly: similar to the breast,but the feathering below is predominant lavender below.

Fluff: lavender with white tinge.

Down: light lavender.

Serious faults

Too small, too large or horseshoe-shaped spangles. Visible tinge in the tail feathers. Lack of spangles on the throat.

Faults

Serious faults to a lesser extent.

Serious faults

Too small, too large, or horseshoe-shaped spangles. Visible residue in the tail-feathers. White throat.

Faults

Serious faults to a lesser extent.

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