@directorysieve, gray is gray, whether you can call it a light black or a dark white. And I’m not saying that there’s anything wrong with the color itself. It all depends on quantity and context.
@archondigital, I agree that an environmental website doesn’t have to look “too green” or “all green.” But if an environmental website looks predominantely one color, IMHO it shouldn’t be gray, as gray is what I associate with a dirty city, not nature. And as much as I’d love to think of myself as special and unique in my perceptions, chances are I am not. Thus it stands to reason that other people looking at that site will have the same association.
Also consider that many folks, myself included, use widescreens, in which case the background gray here becomes rather dominant.