Ralph Lauren was the picture of elegance in his navy blue suit this morning. The Resort show that preceded his bow at his Rhinelander Mansion flagship could be summed up in much the same way. The designer zeroed in on the colors navy and white, accessorizing with bright flashes of gold. The palette lent the collection a nautical, preppy air. Quintessential Ralph, in other words, but also smartly up-to-date.