Thanks Nev,Opaline cinnamon dark green hen & greywing sky blue ****
The hen's 2 mutations are both sex-linked and the ****'s mutation is recessive so unless the birds are carrying genes for their partner's mutation you won't get chicks that look like either of them.
If the hen is not split for blue the chicks will all be green based, about half each of light and dark green. If she is split for blue you will get sky blue and cobalt as well.
Most pet budgies are split for other mutations so you could get some surprises
To breed rainbows you should have a clearwing not a greywing.Thanks Nev,
To breed rainbows to what type of hen should i mate the grey wing