When you think of contrast, you are probably thinking of luminosity, but color contrast can play an important role in creating a vibrant, dynamic image too. Below is the vectorscope for the image before and after:
The adjustments made using color calibration shift the colors into a triad:
This creates more color contrast in the image. This can be a valuable tool for creating a more dynamic and visually-appealing shot. For more information on color theory and color grading, see this presentation.
All of the module adjustments for this image are shown below: