Hey Bill,
From what I know it kind of follows Carla's story. Blue ships are hard to see since the ocean and sky (most of the time) is blue. I have also seen that long ago blue paint was expensive and may have fed the lore at some point. Of coarse many boats are blue these days. I love reading all of this stuff and there is a lot of it out there. If you go for the blue hull just dont whistle on the way to the fishing grounds while eating a bannana after leaving on a Friday in a boat named Porky the Pig.
