To determine whether Sharp's new four-primary-color HDTVs would matter, I spent the evening researching light perception and color theory. If you haven't seen

To determine whether Sharp's new four-primary-color HDTVs would matter, I spent the evening researching light perception and color theory. If you haven't seen the commercials, they're adding a yellow element to each pixel in order to better-reproduce yellows and golds. Anyway, I stumbled across this article on imaginary color. Check out this gem: At Walt Disney World, Kodak engineered Epcot's pavement to be a certain hue of pink so that the grass would look greener through the reverse of this effect.