I see you're a brand new member...welcome aboard the SS sailboatowners.com!
The original color will no longer be a match 'cuz the gelcoat on a boat that old--any boat more than just a year or two old--will have oxydized quite a bit. So what you really need is advice on how to create a matching color.
(A bit out of my sanitation systems "wheelhouse," but I had to deal with the same problem when I restored a 20 yr old boat...have a little time on my hands, so decided to chime in.)
--Peggie