Private Nude. Private Lipstick, a color-changing lipstick that morphs into each woman s personal shade, is the first of its kind to transform a single shade of lipstick into an endless variety of hues. This silky lipstick goes on smooth, and the rich pigment changes within five minutes to leave behind the ultimate perfect shade. Private Lipstick s proprietary formula includes a blend of three naturally derived pigments - annatto, hibiscus, and henna - and the technology behind the classic "mood lipsticks" of the seventies to provide a shade that adapts to suit each individual s coloring. Annatto lends a rich pigment base, while hibiscus flowers offer gentle antiseptic properties, and henna leaves behind a long-lasting stain. Additiona.