This is a question I was going to ask! I've got 4, 10 day old, pure buff orpingtons. Two are buff, one is creamy white and the other a real toffee colour with darker splashes in it's wings. Are they likely to stay these colours or will they become more uniform as they get their adult plumage?
I have one named Tasha, I call her my Tashy, and she was always a lot darker than everyone else and still is. Patty was the lightest at 4 days and still is at almost 4 weeks. The other 5 are almost all the same...of course I can tell them apart because I am their mommy
But Tasha started off being the darkst and still is and Patty the lightest and she still is...don't know if that is much help to you, but thats what I got