girls usually have yellow legs with a shadow on front and boys have a yellow dot on head. looks to me like either a girl or a cross breed, i've never seen one with all black legs but then again i don't raise them so i haven't seen that many. girls usually show barring faster with boys looking black for a little before the barring comes in, cause females feathers grow faster.
How old is the chick? From my guess it's about 2.5 weeks old. A bit young to tell yet the gender, but that pink wattle there is a bit suspicious... Post a pic in 2 weeks and we can have a better idea...
It did have yellow legs with black stripes on the front last week! Now the legs are getting blacker though. I didn't even notice the wattle! I bought it Feb 28th from the 'week old bin' They were all black and white chicks. I assumed it was either BR or black sex link roo.