Nude? Red? Greige? Nail polish comes in a near limitless palette. So, what’s a girl to do when she’s trying to plan the perfect outfit, right down to her finger and toe nails, all from the cramped cubby of a store fitting room? If she has OPI’s recently updated Application (aka the OPI App), it’s as easy as tap, tap, tap. Search over 200 nail lacquer shades in seconds, try on hues in the Try It On Studio, compare retired colors with current offerings and zero in on just the right one to match the outfit of moment. What’s more, the download is free. (Unfortunately, the same can’t be said about that new sweater, pair of pants, dress, etc.)