I had a 2002 Firefighter RoadKing. Parked it at work and found a deep scratch in the tank the next morning. Bike had less than 500 miles on it. Called dealer to find paint code, they were clueless. Call headquarters, took 3 different calls but was finally told the color was ppg porche guards red.
Had a local ppg paint user mix it up and repaint the bike, perfect match.
Long story short.........HOK or PPG is the way to go.
Are you planning to paint your bike yourself, or get a shop to do it? If the latter I suggest talking to them about paint, as they should be able to recommend or buy paint for whatever match you want.