Mulberry is a good match in my view because it shares some bluish notes with dove grey. Imperial might be more decent but it is mismatching in the sense that dove grey is a „colder“ tone than mulberry is as well and imperial is more a „warmer“ one.
Mulberry with dove grey looks special and somehow modern but the contrast is sixties alike.
But I must admit that I never saw the combination of imperial with dove grey in the metal. So congrats to your choice, Quicksilver!
Oh it is another grey! I just saw the link, a very tasteful combination.