Brown out in Pastels is little different story. Some brown out a lot, and some less. Personally, I'm not educated enough to know if there is a way to tell how much a Pastel will brown out. When we got ours, we trusted the breeder (8 Ball Pythons), and haven't been disapointed. Seems the more yellow they are as juvies, the better they hold it, but again, I have nothing concrete to back that up.