It looks like she is white based. she could have a green tint because she has a bit of yellow. I am not exactly sure as i am new to budgie mutations. i hope others can help you more! to me, the green hen looks like a white based pied spangle? yellow head? I hope the experienced members can help more!
The green tint I believe comes from yellow face type two - after they molt the yellow mixes with their feather color making a "seafoam" green color. Blue+Yellow=Green with the light refracting off the budgie (how we humans see color). Genetically the budgie may be something else however we see green.
The hen is an opaline spangle. She is a type 2 yellow face that has turned greenish because of the yellow spreading. If you look under the wings you should see her original body color (It is probably sky blue)
The **** is Type 1 yellow face opaline spangle dominant pied