The electric blues were bred for the color, but the females won't carry the blue gene. You have to breed the male back to a reg female jack, then when the fry gets old enough you breed one of those females back to the father.
There is a lot work to breeding the EBJD's and that is one of the reasons they are so expensive. I just happen to know a breeder and he gave me wholesalers price since I was ordering at a minimum of 18. On aquabid they usually go for 20 to 30 dollars, and if you buy from a wholesaler they will cost you 25 + for a 1 inch juvie.