Ok. "in" WWII or "after" matters.
WWII paint was MS1 MS2, MS12, MS12(mod) MS21, MS32, and MS22
Ref: https://shipcamouflage.com/usn_bb.htm
Post war, through about 1947 the decks were blue (with bright wood decks), and haze gray verticals.
After around '47, Deck Gray replaced Blue--but, you need reference photos to know which horizontals were deck gray versus Haze. And, post-war Haze Gray is lighter (a touch warmer) than wartime HG.
Your mileage may vary.