I have a black one and love it so much that I'd LOVE a white one. The only reason I dont get one in white is because I bought the white east/west to serve that purpose. If I didnt have a red east west as well, I'd consider a red clutch. Just like a little black bag, you always need a little white bag. And as far as "when can you use it?" clutches are so in right now that you can use it dressed up or down in jeans. (just not sweats).
I think it is such a gorgeous bag, but I think that black is more versatile and goes with more outfits, esp. those worn at night. It can also be carried year-round. You should just buy both black and white!!!
I have a white timeless clutch. I love this bag and chose it in white because there are so many beautiful black clutches while there are few beautiful white ones. And a white clutch is necessary for weddings or summer celebrations