Hi,
It depends on what time period you're modelling. When she was in Measure 31 dazzle camouflage, her decks were in a pattern using 5-O Ocean Gray and Deck Blue 20-B. As lost, in Measure 22 camouflage, her decks were Deck Blue 20-B overall.
These colors are available in White Ensign Models' Colourcoats enamels:
US10, Deck Blue 20-B;
US06, 5-O Ocean Gray.
John Snyder