We had a mirror on our dresser that was heavy and rested against the wall. As soon as I took it down for the last time, it took some drywall off with it... Which was... annoying.
It's a simple fix. I used Dap's Fast N Final lightweight spackling. It's pretty neat stuff, you don't even have to sand the spackle down.
I remembered the color, Bayberry Blue (790) by Benjamin Moore so that wasn't an issue. The walls were painted in semi-gloss, but the little sample jar of paint I used for this touch-up was in satin. It's just a tiny little spot so I doubt I could tell.
If you really look at it, you can tell, but otherwise, it's fine.