change car color of picture visitor uploads

I am developing a site for a specific type of car. I would like for a visitor to be able to upload a picture of their personal car. Next, there is a palette of available paint colors. They select a color and then the picture of their car changes to whichever color they selected. Read carefully: If you want to be considered for this, PM me with how you plan on accomplishing this. Which programs, methods,etc. That way I know you have experience and understand what I'm talking about.