How to Know Your Undertone? A Simple Guide to Finding Your Skin Undertone

If you've ever bought a foundation that looked perfect under store lighting and then didn't quite work once you stepped outside, the shade probably wasn't wrong — your undertone was overlooked. It's one of the most common mistakes people make when shopping for base makeup, and it's also one of the easiest to fix once you know what to look for.

This guide walks you through what an undertone actually is, how to identify yours at home, and why it makes such a difference to the makeup and colours that suit you.

What Is an Undertone?

Your undertone is not the same as your skin tone. Skin tone — fair, wheatish, medium, or deep — is what's visible on the surface, and it can shift with the seasons, sun exposure, or your skincare routine. Undertone is the colour beneath the surface, and unlike skin tone, it stays constant throughout your life, regardless of how tanned or pale you get.

Undertones generally fall into three categories: warm, cool, or neutral. Identifying which one applies to you makes choosing the right foundation, blush, lipstick, and even jewellery considerably easier.

How to Check Your Undertone: 5 Simple Tests

You don't need a professional consultation to know your undertone. Here's how to check your undertone using a few quick tests you can do at home. For the most reliable result, try two or three of these together rather than relying on just one.

1. The Vein Test

This is the most commonly used method for finding your undertone. Look at the veins on the inside of your wrist in natural daylight — indoor lighting, especially yellow-toned bulbs, can distort the color.

• Green veins indicate a warm undertone

• Blue or purple veins indicate a cool undertone

• A mix of both suggests a neutral undertone

2. The Jewellery Test

Notice which metals you're naturally drawn to and which ones suit you best.

• If gold jewellery makes your skin look brighter and more luminous, you likely have a warm undertone.

• If silver jewellery looks more flattering against your skin, you likely have a cool undertone.

• If both look equally good on you, you're probably neutral.

3. The White Paper Test

With no makeup on, hold a plain white sheet of paper next to your face in natural light.

• A yellow or golden cast points to a warm undertone.

• A pink or rosy cast points to a cool undertone.

• If it's difficult to tell either way, you likely have a neutral undertone.

4. The Sun Reaction Test

Consider how your skin typically responds to sun exposure.

• Tans easily, rarely burns — usually a warm undertone

• Burns easily, tans less — usually a cool undertone

• A mix of both — neutral undertone

5. The Colour-Draping Test

Hold a warm-coloured fabric (mustard, coral, rust) near your face, then switch to a cool-coloured fabric (blue, emerald, fuchsia). The colour that makes your complexion look brighter and healthier — rather than dull or washed out — indicates your undertone family. This test is particularly useful if the vein test alone feels inconclusive.

If most of these tests point in the same direction, you can be confident in the result. If they conflict, you most likely have a neutral undertone, which is common and gives you more flexibility when choosing makeup shades.

Warm Undertone Skin: What to Look For?

If you have warm undertone skin, you'll typically notice:

• Green veins on the wrist

• A golden, peachy, or yellow cast to the skin

• Gold jewellery appearing more flattering than silver

• Skin that tans easily rather than burns

• A natural affinity for warm shades such as mustard, olive, coral, and warm reds

For makeup, foundations and concealers labelled "warm," "golden," or "yellow-based" tend to blend seamlessly into warm undertone skin.

Cool Undertone Skin: What to Look For?

If you have cool undertone skin, the signs usually include:

• Blue or purple veins on the wrist

• A pink, red, or bluish cast to the skin

• Silver jewellery appearing more flattering than gold

• Skin that burns before it tans

• A natural affinity for cool shades such as blue, emerald, lavender, and true red

Foundations and blushes labelled "cool" or "pink-based" tend to sit most naturally on this undertone.

Neutral Undertone: The Middle Ground

A neutral undertone reflects a balance between warm and cool — not distinctly golden, not distinctly pink. If your vein colour is hard to categorise, both gold and silver jewellery suit you, and the tests above don't point clearly in one direction, you're likely neutral. This undertone offers the most flexibility, since a wider range of foundation shades and colours will suit your complexion.

Warm vs Cool vs Neutral: A Quick Comparison

Why Your Undertone Matters

Understanding your undertone has a direct, practical impact on how your makeup looks:

• Foundation and concealer matching — the leading cause of a base that doesn't blend seamlessly with your neck and jawline.

• Blush and lipstick selection — a shade that looks vibrant on a warm undertone can appear muted or ashy on a cool undertone, and vice versa.

• Jewellery and clothing choices — colours that align with your undertone tend to make your complexion appear brighter and more even.

Once you know whether you lean warm, cool, or neutral, choosing makeup becomes significantly more straightforward. To put this into practice, explore Moira Beauty's foundation and concealer range and compare shades by undertone family to find the closest match for your skin.

Frequently Asked Questions

1. How do I know my undertone quickly?

The fastest method is the vein test: check the veins on your wrist in natural light. Green indicates a warm undertone, blue or purple indicates cool, and a mix of both suggests neutral.

2. Can my undertone change over time?

No. Your skin tone can change with tanning or the seasons, but your undertone remains constant throughout your life.

3. What if my vein test and jewellery test give different results?

This is common and usually indicates a neutral undertone. The white paper test or colour-draping test can help confirm this.

4. Is undertone the same as skin tone?

No. Skin tone refers to the surface colour of your skin, which can change. Undertone refers to the underlying colour beneath the skin, which does not change.

5. Does undertone affect which foundation shade I should choose?

Yes, significantly. Two foundations can share the same depth but differ in undertone — one warm, one cool — which is why a shade can appear correct in the bottle but look mismatched on your skin.