I couldn’t look at the one you posted because it is sold but I know what butters look like. From what I’ve seen, they don’t brown out like a typical pastel but the colors seem to get a little faded or less intense with age. IMO they remain beautiful but they definitely look better as hatchlings. If you want a snake that looks just as intense and bright as an adult as they did as a hatchling you should look into combos with desert ghost. It’s going to be more expensive but if you are happy with how your snake looks as an adult, it’s well worth the price because they are adults far longer than they are hatchlings.