Contrary to what others might say, color correction isn't just a quick 2 minute process. When you color correct, you start off with a general correction of the whole film which includes gamma, black and white points, saturation, and color. Then you go into correcting individual shots. Then individual frames if need be.
Programs like these allow you to correct the colors of only certain parts of a shot, like the walls of the Tantive for instance. What we can do is look at our reference material and see what the color of the walls should be and correct just those, leaving everything else intact.