I love that you were able to get a cross with legbar. I think mine are a cross between a Bluebell and a Welsummer. Still hard to determine my Welsummers from my Starlights. I do have one that looks similar to your lightest one. That’s a definite.
The injured chick in my photos with the bare neck is the only one with the darker chest. I split the chicks with someone. We do not know if the injured chick is a Welsummer or a second Starlight. My light chick is my other Starlight. The pair that looks alike could also be either Starlights or Welsummer

I guess I’ll find out when they start to lay. The one on the feeder is one out of the pair. Got a close up of the feathers.