Congratulations on your new boat.

The repair is not too hard. Matching the color will be impossible.

If you don't have epoxy already, I'd get a filler like Marinetex. A few applications might be needed, sanding in between.

I'm thinking that's not original gelcoat, but a white boat painted blue. But what color blue? The color swatches in the catalog bear only a passing resemblance to what the paint actually looks like. New paint looks different than old paint anyway.

It will look noticeable no matter what you do.