The Spit does not look to me like it has a Temperate Sea Scheme on the uppers. That said, it doesn't look like the Day Fighter Scheme either. The darker colour looks green, not grey but the lighter colour is odd, closer to Dark Slate Grey. The whole colour palette of that pic seems off to me, perhaps having the reds reduced somehow (look at the tape patches over the guns) so I'd be hesitant to conclude that the bottom is Azure Blue.
I agree with you on the Hudson though.