Lollll I don't like illume so much certainly not on light furs I can imagine you was quite surprised to get that new born.
The good part is you can breed a more subtle recessive shade in that line but when a cat is doomed with illume there is no way back from breeding a shade in that kitty's line or you must be increadibly lucky for being able to wash it out but it is hard to tell that for sure XD
I use them as worktable lights my illume kitties and during Christmas I put them in the tree