The modern SSW is going to be hard to match for a couple of reasons:
1. It was originally lumed with tritium, which is NLA. It will take a lume maestro like Jack or Kent Parks to match the lume on a partial relume and I'd wager they would recommend getting the whole thing re-done if you really want the lume to match.
2. I have two SSWs, both of which seem to have different-colored bezel lume. The earlier one is more yellowish (as the one you bought looks to be)

whilst the later one seems to be more greenish:

As you can see, my bezel also needs touching up but I've left it for now for the above reasons.