“Personally, I am a huge fan of red,” Roberts says. “It’s timeless and professional, and you can wear it with anything.” (Try Revlon Nail Enamel in Revlon Red, $4.70.) But if you have a job and you want to tone it down, light pastel shades are the perfect complement for your pretty summer glow. We love Essie Pastels Collection, $18. Just stay away from vampy shades like dark purple or black, Roberts says.

Next: The biggest “don’ts” for a summer job