I got a chance to talk with the breeder of my pair, he told me that they are in fact Nuu Ana X Nuu Ami mixes. They are supposed to be the most colorful and docile of all the locale mixes. I'm very excited to see them start developing color as they grow. Here are a couple shots of the diamond back, they are starting to come in really nicely and I'm starting to see some great shades of green and pink (which I want most of all).
If you look closely you can see the color, but it's very obvious in person.