When looking to paint my old white Mercury outboards I bought some cloud white from a boat specialist. I later heard that wimbledon white was a perfect match. Wimbledon white was used on Ford cars for decades and you can find it at Walmart. But when I looked at them side by side they are indeed different. You can see how it compares to these two motors I have with original paint. I’m going to stick with cloud white going forward.
Check out this site for Mercury paint codes.
Matching Part Numbers 