At the beginning, we went through what a simple CG comp may include, which is distortion, roto, color correction and distortion back.
Then, we learned how to do the basic grade match.
Gain for the wanted color
Whitepoint for the original color
Adjust Lift in the Grade
Take the darkest part
Take the yellow part
Then we can see the difference between the previous one and the one after the adjustment
Other nodes in Arnold Multipass Comp: