Go with the PollyScale. They make some acrylic paints which, if close-enough is good-enough will fit the bill nicely.
#505330 HAZE GRAY 5-H
#505332 OCEAN GRAY 5-O
#505334 NAVY BLUE 5-N
#505338 WEATHER DECK BLUE 20-B
For total accuracy sake, your choice should be the White Ensign Colourcoat line of enamels. In acrylics my first choice would be the MM Acryl II Marine Line of paints - which is out of production and being phased out of hobby shops.