Skin Undertone Test
Five checks you can do right now, in daylight, with nothing but a window, a mirror and something gold and something silver. At the end you get one of four answers — warm, cool, neutral or olive — and the list of colour seasons that answer leaves standing.
No photo, no account, no email. Take it honestly rather than hopefully; the checks only work if you answer what you actually see.
What colour are the veins on your inner wrist?
Daylight only — near a window, not under a bulb. Bulbs push veins green and will bias this answer warm.
Do it in daylight, or don't bother
Every one of these checks is a comparison, and indoor lighting corrupts comparisons. Household bulbs run warm, which pushes veins toward green and skin toward golden — do the vein test under a lamp and you will read warm whoever you are. Fluorescent tubes do the opposite and drain everything toward grey. Stand near a window, ideally on an overcast day, which gives the most neutral light most people have easy access to.
Bare face, too. Foundation is tinted to a specific undertone by design, so testing over it tells you what the foundation thinks, not what your skin is. Same for a fresh tan: it shifts your surface tone without touching the pigment underneath, which is the thing you are trying to read.
Undertone is not skin tone
Skin tone is your surface colour, and it moves — a week of sun changes it, so does winter, so does a flush. Undertone is the pigment sitting underneath, and it stays where it is for life. Two people with visibly different skin tones can share an undertone, and two people whose skin looks the same depth in a photo can sit at opposite ends of the warm-cool axis.
That permanence is the whole reason colour analysis is built on undertone. A palette pinned to your surface tone would expire every August. The skin tone chart lays out how depth and undertone combine, if you want the map rather than the test.
Why olive gets missed
Most undertone tests offer three answers: warm, cool, neutral. Olive skin answers warm on nearly all of them — the veins read green, gold looks better than silver, cream beats pure white — so a three-way test reports warm, and the person walks away with a palette of golds and rusts that never quite works on them.
The tell is a grey or green cast across the face in daylight, and the specific way icy pastels and blue-based pinks make olive skin look drab rather than bright. This test carries olive as a fourth outcome and asks for corroboration before calling it — one olive-leaning answer is a bad bulb far more often than an olive complexion, so it takes at least two.
What an undertone test cannot tell you
Undertone is one axis of three. Depth — how light or deep your overall colouring is — and clarity — how bright or muted it runs — are the other two, and between them they split each temperature into six seasons. That is why this test hands you a shortlist rather than a season: warm leaves six of the twelve live, neutral leaves eight.
Depth and clarity are also the two axes people read worst on themselves, because both are judgements about contrast rather than colour, and you have looked at your own face for too long to see its contrast objectively. A photo doesn't have that problem.
Undertone is one axis. Get all three.
One photo, read for undertone, depth and clarity together and corrected for the light it was taken in. Your season and its palette, in about a minute. $9.
Get your analysis — $9Undertone questions, answered
How do I test my skin undertone at home?
Five checks, in daylight, with a bare face: the colour of the veins on your inner wrist, whether gold or silver flatters you more, whether pure white or cream looks better under your chin, how your skin behaves in strong sun, and the colour cast sitting under your skin in a mirror. Warm skin reads green veins, gold, cream and easy tanning. Cool skin reads blue veins, silver, pure white and burning. No single check is decisive — it is the pattern across all five that means something.
What are the four skin undertones?
Warm (golden, peachy or yellow pigment), cool (pink, red or blue pigment), neutral (neither dominates) and olive (a grey-green cast sitting over natural warmth). Most guides list only the first three, which is why olive is the undertone people most often get told they do not have.
What is the difference between skin tone and undertone?
Skin tone is the surface colour and it changes — you tan, you lose the tan, you get more sun in July than in January. Undertone is the pigment underneath and it does not change. That is exactly why colour analysis is built on undertone rather than tone: it is the part of your colouring that stays put.
Why do the vein and jewellery tests disagree with each other?
Usually the light. Indoor bulbs run warm and push veins green, which biases the vein test toward a warm answer; screens and mirrors near a window are more honest. A genuine disagreement across several checks is also meaningful information though — it is the most common signature of neutral or olive skin, which is why this test scores all five together rather than stopping at the first one.
Can you have an olive undertone and still be warm?
Olive sits over warmth more often than not, which is precisely why it gets missed — olive skin answers 'warm' on the vein, gold and cream checks, so a three-way test reports warm and stops. The tell is the grey-green cast and the way icy pastels and cool pinks make the skin look drab rather than bright.
Does my undertone tell me my colour season?
It narrows it, it does not decide it. Undertone is one of three axes — the others are depth (how light or deep your colouring is) and clarity (how bright or muted). Warm undertone leaves six of the twelve seasons live; neutral leaves eight. Reading all three axes at once from a photo is what the $9 analysis does.
Is this undertone test free?
Yes. The test, the result and the season shortlist are free, with no account and no email. The paid product is the full analysis — one photo or your Instagram, read for undertone, depth and clarity together, returning your season and its palette for $9.