My first two bluespots just hatched, one blue and one brown (or red, I guess.) Both stolen at the same time, both hatched at the same time, but the blue one is from the jungle and the red one is from the volcano. Maybe it's the environment they come from? If that's true, though, it will be interesting to see what colors the offspring have.
Edit: clicking through the hatchery, I'm seeing reds from the coast, so it isn't a question of water, after all. So, no clue. I'll just have to catch a lot more of them and hope for the best!