A white Steinway D or a black Steinway D will sound the same, it's just lacquer....
Universally, those earnest about music seem to wholly prefer the black piano or the natural wood finish, sometimes blonde wood, most usually darker wood.
White pianos are almost universally considered as 'vulgar,' Hollywood cheesy, or downright bad taste (see IJone's response) - i.e. an instrument treated as a decorated item, trivializing the object, and de facto, trivializing music.
But if your living room is all 'white white white' (sounds like a hollywood deco / early moderne set for some starlet's boudoir - also a bit Casino, vulgar hotel or whorehouse-ish) it might be the way you want to go.
If anyone is offering 'golden keys' its one of the more astonishingly vulgar and tasteless nouveau riche things I've heard of in the way of piano decoration.