strange 'greenish' color to the screen after I calibrated it.......

Oh, woes is me..... I thought I would make my display on my MBP look better but instead, it is worse! I can't get it back to how it was. I have Time Machine but evidently I haven't found the right thing to restore it to how it was yesterday..... I zapped the PRAM but that didn't help. I only did it once though.
It's sort of greenish/tan/muted colors..... Help please! Judy