Color and pattern male

Head: white.

Neck: hackle white, each-feather with a medium-wide lavender shaft-stripe, surrounded by a narrow silver-white lace running around the tip; front of the neck white.

Back, shoulders and saddle-hackle: white, below the neck-hackle lavender and white.

Tail: main-feathers lavender; support-feathers lavender with white lacing; sickles and coverts lavender; smaller-coverts with narrow silver-white lacing.

Wings: front white, may be partly lavender; coverts white.

Primary-flights: lavender with white lace on the outside of the outer-web.

Secondary-flights: inner-web lavender with white lace running around the tip; outer-web white, forming a complete white wing when it is closed.

Breast, flanks, thighs, belly and fluff: white.

Down: white, silvery lavender allowed.

Note

Very narrow transverse pigment bars are genetically characteristic of lavender. These bars are darker in color than the rest of the feather, the aim is to achieve color uniformity, they are not considered a fault if present to a limited extent.

Serious Faults

Insufficient or broken shaft-stripes in the neck-hackle. White in the sickles. Presence of lavender in areas that should be white. Shaft-stripes in the saddle-hackle. Strong yellow tint in the ornamental feathers.

Faults

Serious faults to a lesser degree. Insufficient pattern in tail support-feathers and wing-flights. 

Color and pattern female

Head: white.

Neck: white, each feather with a medium-wide lavender shaft-stripe, surrounded by a narrow silver-white lace running around the tip; front of the neck white.

Back, shoulders and saddle: white, below the neck-hackle lavender and white.

Tail: main-feathers lavender, except for the top two feathers, which are vague white laced; coverts lavender with a narrow white lace.

Wings: front and coverts white.

Primary-flights: lavender with white lace on the outside of the outer-web.

Secondary-flights: inner-web lavender with white lace running around the tip; outer-web white, forming a complete white wing when it is closed.

Breast, flanks, thighs, belly and fluff: white.

Down: white, silvery lavender allowed.

Note

Very narrow transverse pigment bars are genetically characteristic of lavender. These bars are darker in color than the rest of the feather, the aim is to achieve color uniformity, they are not considered a fault if present to a limited extent.

Serious faults

Insufficient or broken shaft-stripes in the neck-hackle. Broad and vague white lace tail-coverts. Presence of lavender in areas that should be white.

Faults

Serious faults to a lesser degree. Insufficient pattern in wing-flights.

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