Well, I cheated a little, as I've worn a similar fit before, although with a v-neck rather than a cardigan. I thought it looked nice, but sometimes I fool myself. Here are the pieces, although I don't have a solid grey tie at the moment. I donated the one that I had because I didn't like the way it knotted. I plan to replace it with a Cappelli. I threw in a patterned grey cashmere tie that's slightly darker than what I had in mind, just to provide some reference.