im pretty sure theres no way to sex them by the color until their plummage comes in, so either you can wait for a surprise, or do it the old fashion way of checking out whats down there.
wish i could be of more help but im pretty sure theres no other way.. good luck and have fun with them, awful cute.
Well phooey. I was hoping I could tell sooner. I'm needing to find a home for all but two and would love a male and a female. I guess I could play it on the safe side and just keep one of each of the different colorings and see what happens.