Need a Graphic Interface For Color Choosing

Hello everyone! I have personally developed a working FaceBook profile theme editor. However, the current method that users edit their theme with is too simple. It's merely a box added to their FaceBook profile page, and they select colors from a drop down box. I need an external method for users to edit their theme. It needs to be very graphic. Basically, I want an interactive application that shows a default FaceBook profile page. The user should be able to hover over certain sections, click them, and then choose a color from a color wheel. For example, the navigation bar at the top needs to be editable. For this, there are 4 attributes: background color, text color, hover background color, and hover text color. The interface should allow the user to set these values. Basically, you need to be intuitive. You need to know how to think on your own and come up with the most efficient design for this. If you have any questions or are confused as to what this is, please let me know. This MUST be cross-browser capable. I'd also like to have an explanation of how the code/script works, so that I can edit in my own attributes in the future, as my theme editor advances. When the user hits "Save Theme", all values are simply POST'd to a PHP file, and the rest is taken care of. If you have any questions, please ask them. Let me know how much this will cost. Cost is negotiable, of course.