@Alzaiver89, first welcome to CCF. Second, as others have noted above, your the surface of your coin most likely has been stained at some point along the way after leaving the mint. I'm sorry to say that this color is really just damage and does not add to the value of your coin.
"If you climb a good tree, you get a push."
-----Ghanaian proverb
"The danger we all now face is distinguishing between what is authentic and what is performed."
-----King Adz