My don't we argue over these colors. With respect to the photos Drew spoke about I found that 3 parts of 5NG and 1 part of Tropical Green from WEM give a very convincing representation of what is shown in the photos. Spare the comments about color shifting please. These boats weathered hard and fast.
There were a lot of camo schemes on PT's. If you hunt around on the web you'll find many. There are also some very good reference books.
But if you want to make it your own that's cool too.
Have fun
Dave