[Canuck]

Local Dupont store has 8 color books with every shade you can imagine, or give them a code and they will match from their computer. Once color is selected you let them know % of flat to gloss and what type of surface you are applying, ie rigid plastic, flexable vinyl etc and they mix to specs.

I have had great results in matching blues and greens. i took a green interior sample and they matched stripe paint exactly.

Any auto body shop supply that carries mainstream paints should be able to do the same.

Paul