Foundation Shade Codes Explained: What W, C, N, NC and NW Actually Mean

Foundation Guides  ·  8 min read

Foundation shade codes should make finding your match easier. In practice they create confusion because different brands use different systems, some of which are counterintuitive. This guide decodes the most widely used foundation shade coding systems so you can navigate any brand's range with confidence.

The Basic Letter System

The simplest and most common foundation coding system uses a single letter before or after a number to indicate undertone. W stands for warm. C stands for cool. N stands for neutral. O sometimes appears for olive. The number indicates depth with lower numbers being fairer and higher numbers being deeper. So W15 means warm undertone in a fair depth and C40 means cool undertone in a medium-deep depth.

This system is used by L'Oreal True Match, NYX Total Control, Rare Beauty, Fenty Beauty and many others. Once you know your undertone letter and approximate depth number you can navigate these ranges quickly. The only variable is whether the numbering goes from 1 to 10 or from 10 to 100 which differs by brand but the principle is the same.

The MAC NC and NW System

MAC's foundation coding is the most frequently misunderstood in beauty. NC stands for neutral-cool but the NC shades are actually warm-toned. NW stands for neutral-warm but the NW shades are actually cool-toned. This reversal of the expected logic causes significant confusion and leads many women to buy the wrong shade.

To use MAC correctly: if you have warm or olive undertones, choose NC shades. If you have cool undertones, choose NW shades. The numbers indicate depth from NC10 being the fairest warm through to NC50 and beyond being the deepest warm. NW shades follow the same depth logic. Memorizing this reversal once prevents ongoing confusion when shopping MAC.

Double Letter Codes and NW Variants

Some brands use double letter codes like NW for neutral-warm or NC for neutral-cool to indicate an undertone that sits between two categories. Charlotte Tilbury uses a numbered system with a separate warm or cool descriptor. Estee Lauder Double Wear uses number and letter combinations like 1N0 where the N indicates neutral and the number sets the depth.

When you encounter an unfamiliar coding system, look for any warm, cool or neutral descriptor in the shade name or description. Brand websites often include an undertone filter that groups shades by undertone regardless of the specific coding system used. Using this filter is often faster than decoding shade names individually.

When Shade Codes Do Not Match Reality

Shade codes are guidelines not guarantees. A shade coded as warm may still look slightly cool on certain skin tones because the warmth-to-cool ratio within the warm category varies. The only reliable test is wearing the shade on your jawline in natural daylight.

When a shade code tells you one thing but the result tells you another, trust the result. If a neutral-coded shade looks grey on your skin, your skin is warmer than neutral. If a warm-coded shade still looks orange, try a neutral in the same depth. The coding system gives you a starting point. Your jawline in natural daylight gives you the answer.