At the time of the Bismarck chase, KGV was in overall AP 507B Admiralty Medium Grey on all vertical surfaces, with decks--including wood decks--painted AP 507A Admiralty Dark Grey. Boot-topping was black, and underwater hull was RN Antifouling Red.
If you want accurate colors, we have all those accurately matched and available in our Colourcoats enamels; no minimum order on paints, and we ship worldwide.
Cheers,
John Snyder
White Ensign Models
http://WhiteEnsignModels.com