your car has no paintcode so it is now deemed worhtless so you have to give it to me for free
now to be series,go down to your local car paint supplier,a proper place that sells paint for cars,they'll have thousands of colour samples on card etc,try take a piece from your car,like the petrol flap down with you and go out into the sun light,and see if any match.
A decent place should be able to mix something that should look the same if they're that good