Correct, their is no sure way of knowing until you visually see them. Unless it's like a Super Pastel x Normal. All will be Pastels. Even then, you could get a surprise.
my hope is one day start off with my spider and pastel produce a bumble bee breed the bumble bee to a lesser plat to try and get a queen bee/lesser bee
i aim to breed snakes just to build up my own collection then the ones i dont want ill sell to buy other morphs lol as here in the uk theres not many good breeders about