It's difficult to give my elders any hair colour other than grey. If I try to, it changes back as soon as I select a different outfit or try to save the household to my library.
The only way to do it is to make sure the hair colour is the last thing I change before exiting CAS - and that doesn't help with households I'm trying to save to my library.
I'm not sure if it's intentional but it seems like a bug to me.
