Correcting specific colour with HueCorrect
One of the best tool in Nuke is the HueCorrect. Use it to adjust the value of a particular hue (in this example, greenscreen).
It is similar to Color Range in Photoshop where you can select a particular colour except HueCorrect have adjustment tools built into it to quickly adjust the selected colour you’re looking for.
As seen in the above example, HueCorrect can be utilise to suppress spill colour to give it a more natural tone.