Adult Deserts turn a Khaki color as they mature. I wouldnt say they brown out, but it is a dissapointing change. I dont know how the combos are going to fare. You can look at pro exotics page and check out the desert spyder sub adult. as a baby it was black and White and now it is kinda khaki colored. personally, i like the desert morph and the combos are exciting, i guess we will just have to see which combos are worth making.