Looks like either 1) a yellowface type II double factor dominant pied blue. Alternatively it could possibly be 2) a yellowface type II single factor dominant pied + recessive pied blue. Heres how you tell - if its beak remains orange, it never gets iris rings then its probably number two. If it gets iris rings its likely number one.
The yellow will more than likely become more solid after the first moult, not lighter.