Darth Editous said:

The worst thing is that there is no selective color plugin for Avisynth, at least that I could find with a lot of googling.

*ahem* ;)

A selective colour filter for Avisynth

Any questions will have to be directed to the author, but by a strange coincidence he and I have never been seen in the same room at the same time...

(it doesn't do "Black", but I - I mean he - might get around to that sometime)

DE

That's great! I can't understand why I could never find that plugin though. Anyway, I won't experiment with it yet, but maybe if "black" gets added sometime.

Here's a comparison of the current settings against Mike Verta's version, mine on top. (Hope I don't get banned for using this. I just had to show everyone)

That print has a very high contrast, and if I would push mine as high, some scenes would have clipped whites and an overall extremely bright picture. Just for fun though, I pushed up the white level of this shot in photoshop so you could compare it even better: