I checked out the site you linked to ChicknGurl. I had decided that she wasn't Yokohamas because her leg color wasn't the same. But I noticed on the link, there are few white chickens shown and some have yellow legs and some have green legs. So I would suppose it may work that way for other colors. How confusing. Maybe I'll just have to wait until she is a little older to know for sure. I just have to get the pecking stopped to see her tail. Right now I have several quarantined for bad behavior out of the egg pen.
I have another white pullet that looks exactly like the picture from the hatchery and the roo looks just like the other member's rooster. I'll be making a larger pen for the pair which could include her. (I'm getting to where I'm having a lot of "specialty pens." Think wood duck habitat, taller pen with perches for the yokohamas, pair pens for the Buttercups, Hamburgs & Cochins plus the egg big pen)
I plan to reduce the size of my flock to make it less problematic. But the different breeds are so interesting... On my pullets, I have a Houdan, Spitzhauben, Buff Orpington, a couple of EE and Cuckoo Maran among others. Just no roos.