Checkout http://kuler.adobe.com/ ! It’s new from Adobe Labs.
With Kuler, you can browse, create and share color themes for your web pages and other design/creative projects. You can then download the theme and use them with Adobe Creative Suite 2 apps!
You need to have an Adobe ID/Account to create your own. It has a nice interface and it’s very very simple to use. It even gives you the RGB combination so you can easily use it with your projects. Here’s a sample of the interface.