In common with most FAA a/c of the time, everything was black, since (probably) night flying was part of the normal duties. Post-war harnesses, which were very similar to parachute harnesses, seem to have been a mid-blue, probably to contrast with the usual white of the parachute harness. If you're doing a FAA Sea Fury, by the way, the wheel wells, wing-folds, gunbay interiors, etc., were zinc chromate yellow. When the Sea Fury went to Canada and Australia, overpainting occurred, so anything could (and apparently did) happen.
Edgar