Color and pattern male and female

Plumage: both webs of every feather, along their entire length, are regularly and sharply barred across with alternating parallel bands of light red and red, ending in a narrow red tip. The red and light-red bands in each section of the cock's plumage should be of approximately equal width—and relatively narrow—except in the flight feathers and main tail feathers, which exhibit slightly broader barring due to the greater width of the feathers. Conversely, the cross-bars in the hackle and saddle feathers are even narrower than in the rest of the plumage, owing to the limited width of those feathers.

In the hen's feathers, the light-red bands are relatively narrow, while the red bands are approximately twice as wide as the light ones.

As with the rooster, the flight feathers and main tail feathers display a broader barring pattern. Great importance is attached to straight, sharply defined bars, with no bleeding of the red into the light-red bars and no deviation in shaft color (the shaft itself is patterned with alternating light-red and red sections, matching the bars). The overlapping of the feathers—with the red bars of the concealed sections showing through slightly—gives the bird a reddish cast when viewed from a distance.

Down: red and patterned like the surface plumage, though less distinct and sharply defined.

Serious faults

Insufficient barring. Bars not running straight across the feather. Red bars that are too pale. Presence of entirely red or partially red feathers. White or too black in the visible plumage.  Lack of harmonious color uniformity across the entire plumage. Insufficient barring in the down.

Faults

Serious faults to a lesser degree. Visible black peppering in the tail.

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

Website from Henk Meijers with all available information regarding chicken genetics including the world famous 

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