I can’t get the camera to pick it up but it is toning. The colors are a light gold turning to a dark purple. A tiny bit of red and orange on the border of the colors. It was bright white when I bought it over 25 years ago. Still in the same non-PVC plastic flip as when I first acquired it from my dealer friend.
Nice coins. ‘21’s don’t seem to get a lot of love. I think they were horded because of their one year of mintage making them very common today.