You sure we're talking about the same mutation here? Every red axanthic I've seen that was larger than a hatchling had turned a reddish brown colour. They're still nice animals with some interesting potential, but definitely don't keep an "axanthic" look to them like some nicer individuals of the recessive lines do. Here's a link with some photos of adult red axanthics: http://www.coreywoods.com/red.shtml