None of those chicks appears to be lavender. They could be crossed BUT that dark area in the primary feathers is more than likely splash. The others look blue to me. Lavenders....they just don't look like that if they are pure. Are all these chicks related? Are they from the same breeder? That could explain the twins. LOL
When I say lizards...that is a term we use to describe the chicks that hatch with lesser feather down at hatch. They always have darker beaks, eyes, skin and beautiful dark combs. That chick reminds me of one of my lizards with that very dark looking beak.