It's in between his nose top of the beak the dark part but yes it doesn't bother him at all, just wondering if it will stay that color or how to improve it ^-^Welcome to the avenue!
I can't see the injury too well, but as long as it's not bleeding and he isn't showing signs of pain I wouldn't worry. Keep a close eye on him though, make sure he's eating and active, with no blood or irritation. If you're still concerned, take him to the vet and make sure he's ok.