I can't upload a picture for some reason on the thread but my profile picture is my boys all I know is they are brothers I got them when they were 2 months old.
We can't know for sure without a pedigree. If they're around 5-6 lbs they might be Havanas. Might be small/lean broken new zealands if they're more around 8-10 lbs. They're most likely mixed breeds, though, by far. The color of the one in the back is 'Broken Black', the color of the one in the front is called 'Charlie Black'. Almost all rabbits that aren't specifically sold as purebred are mixed breeds.