They are just natural color variations in the wild pattern golden color birds, which can not currently be line bread for contestant color. There will be an odd lot of whites and browns plus various shades of gold.
If you don't believe me, then order 2+ dozen (Golden/Manchurian/Italian), hatch them out, and see for yourself. The genetics are mostly sound around here, but people need to get their..."Not only, but also" in the right place. IMHO!