When you fidn the right stuff and set about painting it, paint something before spraying the actual car to compare the colour.
It is unlikley to be a good match. However you will find that painting at different temperatures will lighten and darken the finish a little bit. Using a hairdryer or painting after sundown will give you some range to work with. By testing something first at different temps and leaving it to dry until daylight the next day to see clearly how it turns out, you'll be able to fine-tune the final coat you put on the car to the exact right colourNick