When the weather heats up, your nails should tone down. "They should be more natural, not too long, and should look clean and fresh," says manicurist Mara Taskin of N.Y.C.'s Rita Hazan Salon, who recommends corals, lilacs and light pink shades. "Ask your nail technician to help you pick the perfect shade for your skin tone." Taskin's new fave for the summer is a subtle, but slightly punchy, pink from O.P.I. called ElePhantastic Pink.