They are adorable babies and I do like the looks of the father. Speaking from experience, so I hope you don't get offended, I'd put money on the fact that the father is a pastel and the lighter babies are pastels. That isn't a bad thing at all. You did stumble on a genetic black back pastel. Every one of the pastel babies looks to have inherited that gene. Genetic black backs will not always produce a continuous black back pattern in every baby it passes the gene on to but it should always be obvious which ones possess the gene.
There are a couple genetic black backs which were proven to be a separate co-dom morph and produce pretty cool super forms. Like the black velvet which produces the white lace in its super form. If I were you, I'd hold back a female and breed back to the father in 2 years to see if you have one of these morphs. A regular genetic black back doesn't have a super form.
Those babies will loose the yellow and pink coloration with each shed but the blushing should remain prominent everywhere except the head due to the fathers influence.
Snakes, Jeeps, Dragons, Nature, & Knives.. Makes my world go-round!
