So far it’s been working. I have a very old Apple Saddle Brown Classic Buckle and just picked up the Hermès Kilim in noir. To my eye, both look like they match the Natural Titanium case.
I did get my Series 10 with the matching natural titanium Milanese loop and that was a good decision because my old one doesn’t match. Nor does my old link bracelet. Which was expected.
I think in cases like the above, getting a new band is necessary. If it’s just the lugs, it’s fine.