Gosh Doggies, Tim, that is beautiful.
I think that the point that the website is making and that of Van Gogh is that he might paint the yellow/orange Chair (With Pipe) and then, right along the edge of the chair, he places a really clear thin line of blue. That made it vibrate yet in a controlled way.
In other words, it is the use of complimentary colors that are very near in value that is the key. I love the website because it has interactive examples of taking color out of a painting or adding more contrast to just one of the complimentary colors so that it shows that the effect would be lost if the near values were not maintained.
I found the above website today and I'm just really impressed with it. I think that it may be based on Margaret Livingston's theories. I just ordered her book from Amazon and I can't wait to receive it.
Also, the website is going to be invaluable to painters some day when they get it finished. See all of it at:
http://webexhibits.org/