Instyle helps readers match polish color with generation. Keep this in mind for clients who need helping choosing their colors:

For those in their 20s and 30s, it's the time to express themselves. Metallic colors were all over the runways in the fall, and nail polish is not far behind, says the mag. Essie Weingarten, founder and president of Essie Cosmetics, tells Instyle, "Now's the time to make a statement and have fun." Those not ready to take the leap can try it on their toes first, Weingarten continues.

Instyle features Dior Vernis Nail Lacquer in Black Sequins, Lippmann Collection Nail Lacquer in Wicked Game, and M.A.C. Nail Lacquer in Seriously Hip.

For the forty- and-fifty-somethings, bold colors are the way to go. Deborah Lippmann tells readers, "Darker colors like berry and navy are the new classics." She adds that Mad Men has been a big style influence, and suggests filing longer nails to an almond shape for a modern, feminine look.

Featured polishes are Avon Nailwear Pro Nail Enamel in Tweed, OPI Nail Lacquer in Suzi Skis in the Pyrenees, and Estee Lauder Pure Color Nail Lacquer in Black Amethyst.

Finally, for those in their 60s, 70s, adn older, pink and nude will always stay elegant. Those who suffer from age spots should go for a bright red, says the magazine. Weingarten explains, "When you wear a deeper color, it takes the attention away from your skin."

The magazine suggests Essie Nail Polish in Rock Candy, Chanel Le Vernis Nail Colour in Dragon, and RGB Nail Color in RGB10.