. "Since many foundations will tell you directly on the bottle if they’re warm or cool, starting by matching your perfect foundation can set you up with your skin’s undertone.” To do this, he recommends taking a warm and cool shade that look like they could be potential matches and tapping them on the back of your hand. Whichever one blends in seamlessly is the correct undertone—it’s as easy as that.

says to consider your lifestyle and makeup style when deciding on a warm or cool undertone shade. "Some people become more warm or beige during the spring and summer seasons, and go back to pink in the winter,” he explains. Cruz recommends swatching potential matches along your jawline to decide whether or not that’s the shade and look you want to go with. His final tip: Stick with a makeup shade that’s the same color as your neck, or one shade lighter to brighten and lighten up your complexion, and never go darker when it comes to face makeup.

Pay Attention to Your Tan

How your skin reacts to sun exposure can also help you determine your skin’s undertone. "If someone tans well and rarely burns, they tend to have a warm undertone,” says . "On the other hand, if someone burns easily, they more than likely have cool tones. There’s also the possibility of being neutral, where you have a combination of both.”

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