They're yellow. Almost like a fire. At least that is what I gathered based on what I have seen. Considering many normals can be in that same range of yellow I assumed, at first, that the yellow was the same kind of yellow on normals. However between the posts pointing out that it is visual, and the pictures, the only assumption I am left with is that the yellow is the trait that they show (like a fire).
It's very noticeable in these pictures:
http://www.cuttingedgeherp.com/nss-f...tLuckyNorm.jpg
http://www.cuttingedgeherp.com/nss-f...etLuckys04.JPG
Also I'm glad you guys sorted that out, haha, I was just reading the posts and thought I'd have to come in here and explain it. I too am a "bio major" (biochem/neuroscience hoping to do research and go on to an MD/PhD program for neuroscience) and while I just got out of my first year of college I did end up having a little genetics, and talked a lot more with my teacher about the topic, thanks to BPs.