Wellll, it's possible that they might be pure New Zealands, if they came from someone who had a funky colors breeding program. New Zealands are currently accepted in Black, Red, and of course, White. They recently became recognized in Broken, as well. Your two rabbits are an Opal and a Blue. There are people working on getting Blue recognized; I haven't heard about anyone working on Opal. If you crossed Reds with Blues, you'd have all the necessary genes available to get Opals, so it isn't outside the realm of possibility. On the other hand, they may be largish meat-type mixed breeds, too.