Quote from Michael in The Eternal Shriek
Tahani: By the way, uh, what's you're favorite color for the tablecloths? Michael: Well, it's not perceptible by human eyes. It's called "pleurigloss." Tahani: Could you describe it? Michael: It's the color of... When a soldier comes home from war and sees his dog for the first time. Tahani: Hmm. How about blue?