I was being extremely generic with my suggestion of a case of grey paint. Perhaps I should have used an emoticon :roll: . Yes, there were indeed Japanese paints that differed between bases, and not only were there many shades of grey with the USN, weathering effected the finish as well. Blues were used as well, but the water color would change dramatically based on the weather over the sea and the water's depth. Just look at different photos of the oceans and you'll see greys and greens and turquoises and brilliant blues. Water probably has more changes in color than anything I can think of. My favorite camo though for warships is the various dazzle patterns applied to break up speed and course of a target ship.