NEW YORK — Red may be the color of “Moulin Rouge,” but Nicole Kidman knows that white heat is the hottest kind. At a special screening of the film on Tuesday, the actress, a serious collector of vintage, wore this late-Seventies satin and fringe number by Loris Azzaro — flapper, disco and Belle Epoque rolled into one. “With a touch of the courtesan,” said Kidman, who plays one in the movie. For more on the evening, see page 3.