We just completed the Shoppica Drupal 7 theme that integrates Ubercart, the most popular open source commerce modules for Drupal. The Shoppica theme allows for infinite color schemes. You can likerally change every aspect of this theme's colors - with added background textures and several default colors included.
The Shoppica theme also comes with front page and category sliders, custom Twitter and Facebook integration, jQuery product previews with thumbnails, and tons of other options.
This theme is for Drupal 7 and comes with the installation profile which allows for easy installation on a new MySQL database and new Drupal installation. Download it today and have one of the most professional Drupal 7 Ubercart themes on the market.