HoHun- thanks for the link to AutoStitch! I'll download it in a few minutes.
ccheese- there's no website that I'm aware of that has pics of the 'Rufe'. The only pictures of it that I've seen is in a book I have, called "WWII Wrecks of the Kwajalein and Truk Lagoons", by Dan Bailey.
The book says the location is just off the shore of Ebeye in shallow water, lagoon side, south of the pier. There is one photo in the book, and shows the Rufe wreck in poor condition with only the wings and forward fuselage present. To find this, either Hal Parker or I will have to go over to Ebeye and walk the shoreline on the lagoon side to see if we can find it.
So, with the wreck in the state that it's in, it'll be useless as far as determining any colors. In my two dive articles above, I have pics of the Zero off Roi that's folded up on the lagoon floor. I've got several dives on that wreck, and no paint remains on that plane either.
Wish I could help you, but I have nothing to help you with.

I would suggest, however, paying a visit to J-aircraft.com, and asking your question on the Japanese Navy Aircraft section of the forum over there. Those guys are priceless!
Good luck with your Rufe project...post some pics of it as you go so that we can ohh and ahh over it.
Dan