Thanks Victor,
I went and looked at the suggestions, and I tried switching monitor colors from millions to thousands and back, and nothing changed. Then I tried changing screen resolutions, back and forth, still no change.
Then I tried connecting my DVI adapter (no monitor attached, mind you) to the side, triggering a external monitor recognition, and then removed it, while FCP was running. No change.
THEN, as I went to quit and it asked me if I wanted to save the project, the colors went back to normal!!! I cancelled the quit and yes, the colors were all normal again.
Now as I launch FCP again, it’s still normal.
I don’t know what did it, but it’s very strange. At least for now, problem solved.