To celebrate its centennial, Elizabeth Arden is coming out with a limited-edition anniversary lipstick ($20), a sheer-toned shade appropriately dubbed Red Door Red. Packaged up in a retro-inspired gold case, 100 percent of the proceeds will go to Look Good . . . Feel Better, an organization that offers confidence-boosting makeup, skin care, nail care, and hairstyling services for those undergoing cancer treatments. Look for the commemorative lipstick on counters by the middle of the month. A flattering hue with feel-good results — what a perfect combination.