It depends on whether it's all the way through the clear coat or not. A good body/paint shop, or detail shop should be able to get it to where it's virtually unnoticeable if it's just clear coat. If it's through the color coat it's a repaint patch job, and that generally means the whole panel. Metallic paints are very difficult to match. And not just due to paint color shading, but the temp it's sprayed, viscosity, how much reducer, how wet the coats are, etc.
If you get down to Orange County one of these days I'd be happy to look at it, try a few things on it. I've been doing paint and detail work for decades. On the old solid color paint jobs you can litterally fill a chip up with matched paint and then sand it flush and polish it, and it would completely disappear. I've got a 35 year old mercedes in the garage and there isn't a single chip on the front of that car.
EDIT: I just looked at the photo....looks to be just clear coat. Could more than likely wet sand it to get most it out, then polish to hide it. Also possible to spot-touch with clear to fill it up, buff out to blend. I would probably try the latter if it's a deep scratch.
If you pickup a can of TR3 Resin Glaze and polish it, it may very well be almost completely hidden. That stuff is amazing.
