She almost looks blue, doesn't she? Light turquoise, maybe?
Still beautiful, still luminous. You can see the beginning of the roundness to the top of the head that is typical of this species. This will become more pronounced as she grows.
(Is she really a she? I'm not sure, but I'm calling her the female because she is larger than the other one, who I'm calling the male. I won't be able to tell for sure until their sexual features become more apparent as they grow.)
The smaller one has turned a kind of copper-color.
"This is a yummy fly!"