So I have 3 very similarly mutated budgies and have a good hunch as to their mutations but as always, I love hearing what the experts think - and even those who don't consider themselves experts!! Everyone welcome to offer their opinion!
I believe Joey is a skyblue greywing because his grey wings are of a medium shade, and his cheek patch is slightly diluted violet.
Caroline I believe is the same - a skyblue greywing for the same reasons.
I think Venus may be a skyblue dilute because when compared to the other two, her markings and overall body color AND cheek patches are much more soft and well, diluted.
I'm including several of them together in the same picture too so you can get an idea of how they compare to each other.