I agree with Kansascity, I've hatched and raised several veileds and it comes earlier than a year. I've had them all green one day and the next showing lots of color. Be patient, good thing come to those who wait...
my little camo didnt have any great colors at first, also it seems the happier and more rexaled they r the less fancy coloring they show, rexaled = light calm green
at least with my guy. and id rather have a very happy relaxed cham then a colorfull one
dont worry tho your see some color soon enough im sure
My veiled female was 4.5 months old when I got her, and green. Many of her clutchmates started showing more color before she did, but in two months or so (6+ months old) she had some pretty interesting colors going on. Be patient; it will come!