[jcromartie]

While I agree that simple contrast accounts for much of the effect, I'm not sure this is totally bogus. I've heard similar advice in the pixel art community that suggests cooler shading and warmer highlights. I think it's the same concept at work.

[jacobolus]

If the goal is to show that, then the experiment should be set up carefully to equalize the value & chroma, and then test the hypothesis that such hue shifts make a difference. Any effect they have pales in comparison to the value/chroma effect. The explanation as given in this article is unscientific, and shouldn't be taken as serious advice, especially not by "color newbies" looking for wisdom from experts.

(The chromas have arbitrary relation to one another, the hue shifts are non-uniform and essentially arbitrary, and as I showed the values are exactly selected so to "prove" the author's claims. Setting up this experiment with attention to human color perception wouldn’t be that hard.)