ColorTuner_v4 allows you to match different elements of your comp. The manual rgb adjustment has a unique range centered on the luminance of your target color. No need to wonder if it is low, mid or high adjustment. The auto adjustments use a hue range to correct individual colors in hue, sat and luminance. Use the holdout matte to influence an area or the range sliders to affect a specific colored area of the picture. See video below for further insight. 

Reference and Target inputs are taken from BG & Target, to allow you to freeze them using a mux. Matte (input 2) is optional.