Sometimes what looks like the perfect eggplant turns jet black on your tips. Johnson's fix: "Pick one that looks brighter in the bottle or has a tiny flecks of glitter to pick up the light."
Deborah Lippmann in Bad Romance, $18; deborahlippmann.com.
Rescue Beauty in Catherine Nail Polish, $18; rescuebeauty.com.
Chanel in Paradoxal, $23; chanel.com.Read MoreLess