That is incredibly awesome, Charlene. A hearty congratulations to thee! I hope they grow up perfectly healthy.
If they are brother and sister out of the same egg, they are fraternal twins, but what about them being different colors?
Also, because the gene for having twins passes down from generation to generation, I imagine some people might find them quite desireable. I've just had my first clutch of eggs hatch over the last week, so I've a lot to learn about breeding for morphs.
Anyway, I certainly hope you took a lot more photos of this (I imagine) rare event.
Erik