2001 Dime (Dicolored)

I think your coin is perfectly fine, a lot of different factors influence toning and with certain conditions all at the same time or close to it creates nice toned coins.

When exposed to the right environmental influences -- to small amounts of hydrogen sulfur in the air or larger amounts in albums, envelopes, certain paper rolls coins can naturally turn subtle or sometimes brilliant shades of yellow, magenta, turquoise, and other colors.

The color of the toning on a coin is a factor of how advanced and thick the film of toning is. Early toning is yellow ( usually center outward), with the colors progressing to magenta, purple, greens and blue to black.

It would be nice to see some pictures of your coin.....

Robb, Sap is right. I made the mistake of using scotch tape on my 1962 mint set. You should the beautiful toning I Now have across the silver dollar