This new case from Case-Mate is called the Colorways, and it’s designed to work with the iPhone 4. The case itself is made out of three separate, transparent parts, that interconnect and overlap to create vivid secondary colors.
The case works best with a white iPhone, since it allows the colors to really pop. It’s definitely an unusual looking protective case, which means that it will probably sell well. The case also comes with a sticker to allow you to see the colors better if you’ve got a black iPhone 4.http://www.youtube.com/watch?v=0COq8-WtXVM
The Colorways case is available from Case-Mate for $29.99 (USD). There’s no word if different color pieces will be released in the future but that would probably make sense since you’d be able to create even more colors with extra pieces.