Quote Originally Posted by N4S
So they look like they definitely do hold that color like when they are young.
There's no "definites" about pastels. Through selective breeding, it is more common to see such nice colors into adulthood....but there are still plenty of pastels that brown out as they mature. Your best bet for an adult that holds at least some of its color is to buy from a breeder who has hot adults and get some trusted advice on what traits to look for in a baby that will indicate the appearance it is likely to have as it grows.