JoAnn's Irish Boy

[joann]

I agonized over this photo because I didn't know how to get the green/yellow out of the paper and his collar. In the end I took the photo back to photoshop and selected the paper and collar, added a hue & sat. adjustment layer and took out the offending color. I don't know if that is fair but this is what I would do if I were not in a class and wanted to fix the photo.
How would you go about getting the color out in just those areas in CM?