Fixed colouring when no data for country
Made sea less obvious
Revert "Made sea less obvious"

This reverts commit cb302108b77cad3ef02774a8cd48cb824c3f1f31.
Made sea less obvious (without changing the way it's rendered this time)
Merge pull request #32 from jonnyarnold/master

New colours are very nice, I approve muchly. Everything seems to work.