Color male and female

Upper-plumage a uniform, warm, light-yellow, free of lighter shafts or flour-colored deposits.

Some black is permitted in tail and wing-flights.

The male's neck- and saddle-hackle, back, shoulders and the female's neck-hackle vibrant, warm, light-yellow, somewhat darker than the breast-color.

Down slightly lighter.

Serious faults

Clearly different depths of color in parts of the plumage. Too much black, white or gray in the plumage or down.

Faults

The above serious faults occurring to a lesser extent and a down that is too light

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