My Budgies' Genetics

I have two budgies

I gave them a Good go at guessing but I'd feel quite reassured to have a more concrete answer, thank you any and all for the help!

Initially according to what I've been told I guessed recessive pied sky blue for one. His barring being very pale from the get go is very confusing to me, albeit pretty.

and for the other I figured he was a regular Cobalt but he just looks... Off. There's very little White edging his wings, only really noticeable on his alula.

Thank you for reading!!!