Color male and female

Plumage: base color upper plumage is light gray; irregularly distributed feathers or feather sections are colored blue over the entire body, without this leading to plating.

Down: light gray.

Note

The overall appearance forms a regular whole despite the irregularly distributed blue feathers

Serious Faults

Platinization consisting of clusters of contiguous blue feathers. Red, rust or gold in parts of the upper plumage. Highly irregular distribution of the blue feathers over the body.

Faults

A slightly irregular pattern. Minor rust deposits. Black instead of blue feather sections.

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