Try searching for 'leg color genetics' on this site. There's an explanation somewhere here about it. I don't remember how it goes.
Mary

Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Yes, that's my cochin (Billie Idol), I was not paying attention as close as I thought I was when I posted it. She's a doll.Doesn't she have feathered legs? Very cute!
Mary
They're about 4 months or so.How old are they actually. Their adult feathers may come in a different color. I have a bunch of white Silkies that fathered a bunch of black babies with white hens that stayed nearly black. Fuzzy legs, black/mulberry combs, black bodies with deep dark mahogany capes as adults. But they also fathered some that started out black then turned white with red shoulders, long spiky hair and hairy legs too.
Chickens genetics, I can not figure it out!
She is adorable!Here's one of the babies.