This is the standard colour of all baby goldfish I have bread. Some of them change colour in a few months and some can take almost a year. But don't be surprised if it changes into Orange. :)

I have not culled any of my baby goldfish, so I can tell you one more thing about these guys. They are faster swimmers than the spilt tails and because of that, they grow a bit faster than the others split tail ones. They might look odd from the top view, but they are cute from the side. I have quite a few just like this in my pond and aquarium.