I have had good results in having the yard match the gelgoat for small repairs... They have a tint kit they use to get the correct match... the experience factor (and supplies etc) is worth the extra expense in letting a pro do it
Agree with Cap on the factory, I had good luck on matching the color with what they supplied on my 42cc ( French Boat), but found out that iBoats sells the same spectrum gel coat they supplied at a little cheaper price than Beneteau. Check this link out they seem to have all years covered.
http://www.iboats.com/Beneteau-Gel-Coat/dm/cart_id.532835342--session_id.573960667--view_id.823467
Jim O’
Southern Star 42cc
St. Augustine