Well if you're referring to the copper nickel toning that happens quite often due to the environment. In large your photo couldn't see anything that indicates some kind of an error. Oh by the way welcome to CT young man. USMC60
Since your new I think you'll like this thread of mine https://www.cointalk.com/threads/environmental-damage-or-works-of-art.289634/ This thread will give you some idea of what can occur when coinage is turned loose in the general public. USMC60
Looks like a regular dime with spots to me Nice photo, though. You can post full size instead of thumbnail. Welcome!
Very very slight misaligned die strike, and mechanical doubling on the letters IN GOD WE TRUST, date and mint mark. (ejection doubling, machine doubling) Worth a dime. But there are errors out there. It's a needle in a haystack scenario. I have found errors in circulation, but it's rare and I am a dinosaur.
