According to Raven, the camouflage pattern is made of 507B and 507C. The forward two 8" turrets were painted light grey. Aoshima's instruction shows all four turrets light grey. But a photo in Cruisers in Camera by Roger Hayward shows all four turrets in the darker colour, only the rear of three of three of the turrets in the lighter colour.
Here is a similar photo:
Dorsetshire in 1941
All of the photos, which I had found, are dated to be from the second half of 1941.