To reiterate the answer above, there are some thing you can do if the scene is in full sun light but generally the better you plan in shooting, the better the end result will be.
I recently edited a 70 minute music set shot with three DV cameras. The stage lighting was different when looking from stage left that from stage right. Bad color lights abounded and all I could do was to color correct each clip as best I could to compensate. Not my best work but since I didn't shoot the scene, I did all I could, and it took at least twice as long!
It really comes down to "garbage in = garbage out"