Use a light grey or white primor, the darker colors emit the greenish color when mixed with yellow. Plus the lighter colors are covered easily with yellow. I wet sanded mine down (with 1500, then 2000) to minimize the thickness of the clearcoat. Then buffed it back to a shine with diamond cut polish, then followed with a new car glaze.
You need to let the paint sit till it looks pretty close to the right color then shoot clear over it.
If all else fails you can tint the paint. Best results come when you mix as directed by the computer, then add a touch of orange.
From what I have seen, it will never match perfect due to the clear coat.
Once you get it too match in that particular lighting, when you leave and go somewhere else a different color will be reflected and it will not match anymore.
During the day when it is bright as hell the paint matches perfectly on mine as long as I am parked in a parking lot with concrete, not asfault.
At night it looks too dark, in the day on other surfaces, a little light with green tint.
I do not know what to tell you, but if you like the color of the car, then in the future put a little lighter shade of yellow over the whole car, then clear it. It should look simular to the color you have now.
But not the same.
I too like the bright (non-cleared) color of our car, but it seems impossible to get back to it.
Sorry if I am not of much help.
Laters Peeps