I scraped a mole now its back and its a bit darker will it go back to its original color?

It better!!: And if it doesn't, get it checked-out. Give it two weeks. A dermatologist would be your best bet, but your regular doctor could at least give you a good first opinion. Any mole that won't heal after being scratched, or grows in size, or has different colors in it or has rough edges you can feel is a cause for concern So is one that talks to you at night, but that would be a separate problem.