I remember going into an Automotive Paints store years ago and seeing a machine that could mix paint to match your sample.
It seems these machines are not as rare as they used to be. How to Match Paint Chips to the Actual Paint Color | eHow.com
As to what it is painted with, that is probably anyone's guess after 21 years unless you have owned it or known it's history since new.
As to what brand to buy- make sure you have your reading glasses and a bit of time as I am sure this thread will soon fill with a myriad of suggestions and explanations as to the good, the bad and the ugly of the marine paint market today.