For color, simplest to assume all blacks but a lot of them will show off color areas when adult, especially the males but the females will have the genes for off color, even if they are apparently solid black. Black roosters with brown or white on necks etc(not much a problem if showgirl...
Naked neck is semi dominant, which means it will show up in chicks from a cross of naked neck with not naked neck. So, showgirl x silkie will produce naked necks(showgirls in this case).
How many chicks are naked necked depends on if the naked neck parent is pure or not pure for it.
If it...