Don't remember if I'd stated this before... But I was able to contact the breeder. I asked him about the color changing. It isn't getting stained or changing colors on its own. The greeness of it's sides are from food.
Food/substrate/ self color change/and supplementation all affect your frog colors. If you use the multivitamin supplement Reptivite that contains Betacarotine your frogs yellows and oranges will become brighter as well as the bright greens of their stripes.