She sure is pretty! The US Continental Giant club says does 10 months and up should be over 14.8 lbs., so she is a bit small for a Continental Giant bit she won't stop growing until she's about 14 months old.
Welcome to the forum!
I need to brush up on my color genetics before giving much advice, but gorgeous bun!
From what I've seen online, it looks like the preference is to breed chocolate to chocolate, but people breed black to chocolate sometimes if there isn't any blue in the black dutch's...
Good job caring for the surprise babies! That is really interesting about the kit with the short, curly fur. I agree that it does kinda look like an astrex.
These are so cool! Have you tried posting about them on facebook? I'm a member of a few rabbit groups on there and people are always asking for advice for their pets with sore hocks.