I'm in a total rush to post a good answer as I'm outta here for a bit...
Adult Sanzinia are not as beautifully colored as babies. Neither Greens nor Mandarins. However the colors of the adults vary significanly from "blah" to "wow". I have a couple adults that I think are rather drab colored, but the female has the most awesome head and the male has a gorgeous lemon yellow belly. I have another female that's nicer looking and one male who is gorgeous.
Each clutch has it's standouts so I breed all of my adults to keep as many genes in the pool as I can. As the years go by, folks will concentrate on breeding the best of their own litters with selective breeding.
There is a lot of potential and a lot of gorgeous snakes to be made... it's gonna take some generations though.
Baby green phase sanzinia are bright red and slowly change to green.
I'd say more... but I'm out.
Bye,
Doug T