Although I own a couple of pairs of them myself, I’ve always found grey shoes a little hard to style. If you’re not careful, they can end up looking a little drab, and just a bit “officey”.
These ones by DSquared2 definitely aren’t drab. They have that wonderful, brooch detail on the heel, for one thing, and while it, being black and silver, doesn’t exactly add a shot of colour to the overall effect, it does give them an injection of glamour. I also think the shape of these helps make them more interesting: there’s nothing particularly “different” about it, but it’s still the kind of shoe that would make me look twice, grey or not.
If you do want to brighten these up, I think the wintery fabric makes them the kind of peep toes which can look good with tights, so try them with some jewel tones if you want to lighten the mood.