[TarponTom]

JohnB,
Your going to have to color match this yourself. There is no gelcoat for older boats thats going to match correctly off the shelf. Too many factors involved over the years to guess what the match should be. The marine centers such as West or Boat US have gelcoat repair kits with coloring agents to attempt a match. Problem is the color changes as it cures, so the only way I know is to mix and cure and try to duplicate the proportions if it looks good. You can buff it out after its cured to blend so that most people would ever know but you where the repair was. I'm certainly no fiberglass expert, maybe someone has a shortcut I have'nt used.