Change multiple product colours to to specified colour

Hi all, We would like to offer our clients/resellers an online solution whether it is on our website or a desktop solution to be able to universally change the colour of all products and upload their logo that would automatically insert onto each products predetermined print/engrave area. I assume jquery/ajax maybe the best solution. We can colour match our products to a clients specific pantone reference, so online this would convert their PMS reference to hex/rgb equivelent. We wantto quickly and efficiently provide online mocks so they can choose the model that would best suit their brand colour and logo. There would be around 200/300 very similar shaped products, some all the body would need to change colour some only the trim would change. On some plastic models there are metal sections that need to stay the same colour. Some products are all metal so we would want to keep shading/tranparency to look realistic. The all metal products can have a seperate page if this helps. Clients logos often have a white backround so we would want the option to remove this if needed before they are automatically inserted onto each product image. We may also want the effect of engraving onto metal or embossing onto leather if possible. As stated these can have seperate pages if makes coding easier. We would ideally want a colour picker or the option to enter a specific colour reference such as hex/pms/rgb. The website is currently being built in wordpress, but we are open to other online solutions our clients can use. Thanks for you time is greatly appreciated Pete