If you really want the interior trim color code, open your hood. Right near your drivers side strut top hat, you'll see a rectangular piece of metal with numbers and letters stamped into it. Look for "Interior trim" and there should be a 3 digit code of numbers and letters. Thats your interior trim color code. Take it to a store that mixes paint for automobiles.
-OR-
Take the piece off you want to paint, bring it into a store that sells multiple colors of spray paint. Use your eye and match up the color of the piece to the cap color on the cans, buy what you need.