Generally not that good. The bright spot in the center indicates a cleaning attempt. The ideal color for a cent is light tan to milk chocolate. Green is not good, and black is an acquired taste, which I have never acquired.
The green toning by itself doesn't mean anything, although I agree with @johnmilton that this coin has been given some post-mint "love". From the photo, I can't tell if the green color alluded to is actually there and is natural - so much depends on the light. I would call the OP coin a F-12. As to color, "Greenies" are a legitimate color for old copper. See my 1839 below. I've included the original envelope with the EAC grade for comparison. Also shown are two pages from the EAC Grading Guide showing the range of normal colors that can be expected from unaltered early copper.
Guessing f12. But I want to give it a bump. These good grades gots to be hard to fine. Red book not a lot of fun for grading verbiage
Hair over the ear must be very touchy. Must be very hard to get a high grade. So that’s what a really nice one looks like. Great picture