Yellow = White ?? sometimes? always?

[klf73]

I have some mutt chickens that we hatched, hens were either black orps or australorps and rooster was mostly grey (would love ideas on possibility of breed, standard and hardy, didn't get to see because it was killed by a dog). Out of the 9 live chicks we have 3 that are a pretty grey/silver and yellow and the others are black and yellow (2 have the yellow almost diluted to white). They vary in age from 2.5 weeks to 1.5 week. I was wondering if the grey/yellow ones were going to just change to grey/white? At what age to chickens get the adult colors?
Thanks
Krista

 

[silkiechicken]

They'll get their adult colors pretty well down by the time they are 3-4 months old. To get final colors, might have to wait till after their first moult. But you should know in a few months.