Change colors in photo using javascript

We have a product that we allow our customers to change the colors of (Photos are attached). We need our customers to be able to use 3 javascript or flash color pickers to change the 3 colors of these products on the fly. We are open to any technology, but would prefer something client side like JS or Flash. This is all we need to do. If it is possible, please PMB me with your plan on how you expect to execute the project, what technologies and libraries you will use, and how quickly you expect it to be finished. Please PMB with any questions.