[velvet]

I can't see myself using this as a service for casual wear, or even office wear.

In line with BobbyH's point 2 - I'd suggest looking into formalwear and weddings markets. In the "not wearing a white/ivory/champagne gown", it's really hard to find a way to match gown, hair accessories, shoes, bags etc, and then add in bridesmaids.

If you can find a way to select matching gowns - that would be hugely popular in both wedding and formalwear markets (going to prom with your besties with gowns that look awesome together I'd bet would get people in the door to your service, and if you can convert that to loyalty...)

Weddings and formal events are times when people spend more than they otherwise might on matching clothes and accessories, and for many will be the only occasions where they'd indulge themselves in a completely new outfit from head to toe.