Okay - after I just received the nth email of someone who offered to convert my AS2 ColorMatrix class to AS3 I finally have to get out this post: Of course I have created an AS3 version of it a long time ago, I just didn't find the time to document it or create a demo for it.
Anyways in order to save all those helpful people out there any more unnecessary work here is the barebones com.quasimondo.geom.ColorMatrix Version 2.1 for you to download - it's released under MIT License.
Compared to the AS2 version I have added several new methods and of course tried to use optimizations wherever possible. Two new methods that are especially interesting are:
rotateHue() which tries to preserve the luminance whilst changing the hue (which means this is the "correct" but calculation wise more complicated way of doing it).