Normal sky blue male.
(Males have bright blue ceres; females have white/pale blue, tan or crusty brown ceres.)
Breeding outcomes are determined by the pairing of dominant and recessive genes. In addition, some genes are sex-linked. Each chick receives one of two genes from each parent.
Budgies are either green/yellow series or blue/white series. Since green is dominant to blue, all chicks coming from a green & blue series budgie pairing will be green series ... unless the green parent is split to blue.
Some mutations -- such as dominant pied -- are dominant to normal. Thus, if you were to pair your bird with a single factor dominant pied hen, 50% of the chicks would be dominant pied and 50% would be normal.
Some mutations -- such as recessive pied -- are recessive to normal. Thus, if you were to pair your bird with a recessive pied hen, all the chicks would be normals ... unless your bird is split to recessive pied.
Last, some mutations -- such as opaline and cinnamon -- are sex-linked, which means a chick of one gender might show the mutation whereas the other gender might not show it, even though the bird is split to it.