My crested gecko Lex has been posing up a storm lately!  Here are a couple of new snaps of her antics.  If you think she looks significantly yellower in the middle photo than the other two, you're correct - and it's not an illusion due to lighting or camera settings.  The white versions are her "fired down" state, while the yellow is a more active coloration; when she's really intensely "fired up," she can actually even reach a medium brown, but that's relatively rare for her.