Brown and Blue Turtles!

When a turtle spawns, either naturally or from an egg, they’ll have a small chance to be brown. They’ll have an even smaller chance to be blue.

The different colours baby turtles, could drop different coloured scutes when they grow up, and could be used to craft different coloured turtle shells. These shells could give a longer water breathing effect depending on the rarity of the colour. 

When breeding, this could work the same way axolotl colours work.