Congrats on your colorful hatch!!! Great pics
I think your guess on the Coral Blue keet is correct, he just seems to have a greater amount of tan mixed in with his blue head stripes. They normally have white wings all the way up to the shoulder, so I don't think it's Pied, could be tho, since I do see a Pied Lavender in your hatch.
The Royal Purple may be Pied as well, he seems to have an extra amount of white on the sides of his head/face.
I'm having a hard time seeing the exact colors of the possible Buff Dundotte keet, but it may be a Lite Lavender if it has a silver tint to it's body color at all. It does look like a Buff Dundotte in the first pic tho, but the 2nd pic it looks much lighter, lol. So just watch the feather shafts under it's little wings as they start to come in... white, off-white or tan-ish tinted shafts will mean it's probably a Buff Dundotte, where as if it starts getting silver or blue-ish tinted shafts it will probably be a Lite Lavender.
Be sure to post more pics as they start feathering out sometime next week or so and if you are still unsure of what some of them are, I may be able to narrow it down better.
Adorable hatch tho with all the different colors, Congrats again
