Here is a page which has solid color backgrounds.
Just click it on the color and the page will redirect to the solid color you choose to clipped it or you can download it and add to your items by the tag "add items".
I hope this is useful for everyone. ^^ https://www.solidbackgrounds.com
Is anybody using the app, combyne? I just discovered it today but its very active. Pretty much like polyvore and urstyle. You can make outfits, enter contests, upload items etc etc. The outfit creator is a bit bare at the moment but so easy to use.
Urstyle is better in terms of just finding stuff and browsing through people's collections, but it's a nice alternative so far. User is @___ugly if anyone has an account on there.