This little script lets you test how different colors look with each other... quite cool.
http://www.codecube.net/demos/color.html
I found it at some website about 4 years ago, and I new that I would never again return to that site, nor would I remember where this great tool was. So I copied the source, and put it up on an old website of mine.
I post it here because I think it's a great tool that I have used many times through the years. If I remembered what site I got it from, I would give them credit, but alas, I don't so please don't sue me or something.
Hope this helps some one out there.