Maybe I'm missing the point here, but why would you want to use those two curves ? Photoshop's standard stuff is (for me) more than sufficient to correct specific areas or specific colors or color ranges. Especially when using and storing (quick) masks, the options are endless. So, if it was meant to make the colors above more real, I don't think it's looks very good at all. Both the blue and red colors are too far off, as far as I can see :)