Late last year I cracked the rear rim on my Bianchi, which had wheels built with silver Velocity Blunt rims. I have since replaced them with white Stans Flows (same Hope hubs...just rebuilt with the new rims).
The result turned out pretty good. The white rims match the white Bianchi bands pretty closely. Here are some photos...
So far the white finish is holding up pretty well. It is more durable than the black, and rock rash shows up less prominently. If you are considering Stans flows, definitely check out the white option.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: New whitewalls for my Rita