Everything I saw was black. The scale on the wire was very easy to get off. It flaked off with your fingernail leaving fairly shiny looking wire behind. If you see green on the wire I would suspect that was water damage.
As an aside, to advance the theory that this may have been water damage to the drywall on the ship, the drywall I saw that was removed did have traces of black mold on the back and that might explain some of the respiratory problems some claim.
