Red lipstick is like the little black dress of the makeup world. But with so many shades available, it can be hard to pick a favorite. What's more, it can be nearly impossible to pick a red lipstick that complements your skin tone, if you're not sure how to go about it. As a general rule, stick with the same shade undertone in the reds as one's skin undertone, cool with cool and warm with warm, says Kirsten Kjaer Weis, makeup artist and brand founder of Kjaer Weis. And while you can and should wear any color that makes you feel your best, being equipped with some basic guidelines can help you narrow down your choices if you are trying to suit your skin tone. A good red lipstick can make a bold statement. But with so many variations in skin tones and undertones, some trial and error is needed to find the right shade. Keep these tips in mind when shopping for your perfect red.