Interesting question, I too have tryed to "draw" some correlation/pattern of neonate eye coloration and the final background coloration as adults. I have observed that red/maroon neonates almost always have a reddish/orange background coloration and yellow neonates have a light yellowish coloration. Now with "flame" (reddish stripe down their back) babies, do seem to have more vaiability. Yellow babies do seem to keep their "light" eye color background into adulthood, while red one seem to have more varibility as adults.
From my observation maroon neonates have the highest potential to have the dark brown (almost black), olive, whiteish and red eyes as adults. On the topic of localities, I really do not know. As more mixed locality breeding takes place....no sound final projected adult eye coloration rules apply.
Thanks, Ken