Replying to Why is my cat BLUE?

so i just returned from some traveling. i have a 6 week old kitten, she is laying on my lap right now and i have noticed that there is a slight light blue tint to her fur in a couple spots on one of her leg. my mom has been catsitting her- and there is no chance that she was anywhere near any bleach which is what i first thought could be the reason. she was not blue two weeks ago. she is an indoor cat. and the only thing unusual she's done in the past two weeks in fall in toilet a couple of times. WHY IS MY KITTEN BLUE? manny ramirez need your help guys. she's not at radiant and beautiful with a blue tinted leg!