Hi Luns, Assuming that you're painting her in her 1943 Admiralty Dark Disruptive camouflage using the colors G5, B15, B30, and B55, her decks were painted in G5. All of those colors are available in our Colourcoats enamels.
Cheers,
John Snyder, White Ensign Models, http://WhiteEnsignModels.com