Of course, white truffles aren't really white. But I think we can let it go. Crabmeat maison, Galatoire's. The sauce is so white it almost glows. It's richer than it looks, and a little cheesy.
Oysters are grey, but a very light grey.
Crabmeat ravioli, La Riviera. This is the original version of a now-widespread dish. The Alfredo sauce finishes a serious treat. Truite au vin blanc, Antoine's. An underrated dish over there.