Red-neck
Color and pattern male
Head: dark orange-red.
Neck-hackle, shoulders, back and saddle-hackle: orange-red.
Tail, primary- and secondary-flights, front of neck and breast: entirely green-glossy black.
Belly, thighs and rear-end: black.
Down: greyish-black.
Serious faults
White in any part of the plumage. Excessively faded or broken color in the red feathers. Black spots on the back. Breast or back too heavily laced. Visible wing-triangle.
Faults
Serious faults to a lesser degree.
Color and pattern female
Head: red.
Neck-hackle: red, some pattern is permitted.
Shoulders, back, saddle, tail, front of neck and breast: entirely glossy green black.
Belly, thighs and rear-end: black.
Down: greyish-black.
Serious faults
Clear pattern, except in the neck-hackle.
Faults
Serious faults to a lesser degree.
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
Create Your Own Website With JouwWeb