Identify your skin tone: fair, light, medium, tan, deep
Determine your undertone: cool, warm, neutral, olive
Match concealer to your foundation for blemishes and spot concealing
Choose one to two shades lighter than your skin tone for under-eye brightening
Use a peach or orange corrector for dark circles if needed before concealer
Select a shade with the same undertone as your skin for the most natural match
Test shades on your jawline or under-eye area in natural light
Check how the concealer looks after it dries
Avoid shades that are too light, which can look ashy or gray
Avoid shades that are too dark, which can look muddy
Pick a formula that suits your skin type and coverage needs
Compare shades against your neck and chest for consistency
Use different shades for under-eyes and blemishes if necessary