Your model mate. At the time of the Bismarck chase I think the hull was AP507B and the superstructure was 505C.
Not sure when she was repainted, sometime in 1942, the shields weren't added to the 4.7 until august '43 - give or take the kit fit will be close for mid / late 42, at which tme she could have still been in grey.
But as I said it is your model.
If I get the puppy I will be backdating to the Bismarck chase fit.
Careful with that one Si.
I think Rodney and KGV were painted the same at the time of the Bismarck episode which means all vertical surfaces were AP507B and horizontal/decks were dark deck grey. AP507A/B being applied to home fleet vessels while AP507C was used on foreign stations at that time.
AP507C was only applied to the superstructure with the hull in AP507B post war. Rodney and Nelson didn't survive much beyond the end of the war and never (If i recall correctly) received that paint scheme.
According to Sovereign hobbies what we used to think was AP507A was in fact dark deck grey. Dark deck grey was in fact its own colour while AP507A was just a variation on AP507B.
There's a great colour chart here which provides colours per year and where the vessel was stationed.
But of course, as Si said Warren, it's totally up to you