Two Numbers Define Every Foundation Match
Every foundation match requires two accurate readings: your depth (how light or dark you are) and your undertone (the secondary colour beneath your skin's surface). Getting one right and the other wrong produces a foundation that never blends away.
Depth: Your skin's lightness or darkness. Most brands use numbered scales (1.0 to 10.0) or descriptor names (Fair, Light, Medium, Deep, Rich).
Undertone: The secondary colour beneath your surface skin. Three categories:
- Warm: Yellow, golden or peachy cast
- Cool: Pink, red or bluish cast
- Neutral: A balance of both; no obvious single cast
Identifying Your Undertone at Home
The Vein Test
Look at the inside of your wrist veins in natural daylight (not artificial light).
- Blue or purple: Cool undertone
- Green: Warm undertone
- Blue-green mix: Neutral
The veins appear green when the overlying skin has a yellow tint that shifts the blue of the vein toward green.
The Jewellery Test
Hold silver against your skin, then gold. Observe which makes your skin look more alive and even.
- Silver flatters more: Cool
- Gold flatters more: Warm
- Both look equal: Neutral
The White Paper Test
Hold bright white paper against your bare face in natural daylight. Your face appears to have a cast against the white.
- Pink or rosy: Cool
- Yellow or golden: Warm
- Neither obvious: Neutral
Use two or three methods. Look for consistency across results rather than relying on one test alone.
Answer questions about your skin tone, undertone and the look you want to achieve. The Makeup Advisor recommends specific foundation formulas, shade codes and application techniques matched to your skin type and goals.
Get My Foundation MatchTry the Beauty QuizReading Foundation Shade Codes
Every brand encodes undertone in its shade names. Learn the system to decode any shade you see online.
| Brand | Warm Code | Cool Code | Neutral Code |
|---|---|---|---|
| Fenty Beauty | W | C | N |
| MAC | NC (warm-toned skin) | NW (cool-toned skin) | N |
| L'Oreal | W, G (Golden) | C, R (Rose) | N |
| NARS | Dewy varies | Check suffix | Check formula |
| Maybelline | W | C | N or blend |
The MAC NC/NW confusion: NC means Neutral Cool and is for warm-toned skin. NW means Neutral Warm and is for cool-toned skin. This system is counterintuitive; memorise it or you consistently buy the wrong shade.
Shade-Matching Online Without a Store Visit
Method 1: Use the brand's shade finder.
Most major brands have photo-based or questionnaire shade finders. Photo tools require a natural daylight photo with no filter and a neutral background for accurate results.
Method 2: Use a shade conversion from a known match.
If you know your shade in one foundation, use findation.com or Temptalia's shade finder to cross-reference your exact shade across hundreds of other formulas.
Method 3: Order two adjacent shades.
When unsure between two shades, order both from a retailer that accepts returns. Return the wrong one within the return window.
Method 4: Buy sample sizes first.
Fenty Beauty, Charlotte Tilbury and many brands sell 5ml to 10ml samples for £2 to £8. This costs far less than returning a full-size bottle and gives enough product for 3 to 5 wears to test in different lighting.
Matching to Your Neck, Not Your Face
Your face and neck are often slightly different tones because your face receives more direct sun exposure. The goal is a foundation that matches your neck.
Test potential shades by swiping three candidates along your jaw line. Wait 5 to 10 minutes. The correct shade disappears into your skin. Wrong shades appear lighter or darker than the surrounding area.