8. You Must Match Foundation Exactly to Your Face

Many people assume foundation should be matched only to the skin on their face, but this can cause an obvious line at the jaw or a mismatch with the neck and chest. Skin tones often vary between the face and body due to sun exposure or skincare habits.
Experts recommend testing foundation along the jawline and blending it down toward the neck for a natural, seamless look. According to advice from Makeup.com, choosing a shade that harmonizes your face, neck, and chest ensures your makeup appears flawless and cohesive in any lighting.