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How to find your undertone
Find your undertone by holding plain white paper against bare, clean skin in indirect daylight: golden or peachy is warm, pink or bluish is cool, beige is neutral, a faint green or gray cast is olive. Undertone is the hue under your skin and does not change with tanning; skin tone is depth and does. If you are testing under an indoor bulb or with makeup on, the result is the lighting, not you.
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VerdictTone moves, undertone stays
Verdict
Tone moves, undertone staysUndertone is the constant beneath your tan
Find your tone: Undertone test →Tone and undertone are different things
Skin tone describes surface depth: how light or deep your skin reads right now. It shifts across the year with sun exposure, and it can shift over a few weeks. Undertone describes the hue sitting beneath that surface, the warm golden, cool pink, neutral or olive cast that persists whether you are at your lightest in February or your deepest in August.
This distinction matters because products are sold on both axes at once. A foundation shade number usually tracks depth, while the letter or word beside it tracks undertone. Get the depth right and the undertone wrong and the product will look correct in some light and distinctly off in others, most obviously in daylight.
The tests that actually work
The white-paper test is the most reliable thing you can do at home. Hold a sheet of plain white paper next to bare, clean skin in indirect daylight, with no makeup and nothing colorful in view. Against true white, warm skin reads golden or peachy, cool skin reads pink or bluish, and neutral skin reads close to beige. Olive skin shows a faint green or gray cast.
The jewelry test is the second useful one. Lay silver and gold against your skin in the same daylight and look at which one disappears into you rather than sitting on top. Gold tends to harmonize on warm skin, silver on cool, and both work on neutral. Olive skin often flatters gold but looks sallow next to bright yellow-gold specifically.
What to ignore
The vein test is the most repeated method online and the weakest one. Vein color is driven heavily by how thick and how translucent your skin is at the wrist, and by how deep the vessel sits, so people with the same undertone frequently see different colors. Many people also see both green and blue and conclude they are neutral when they are not.
The sun-reaction question, do you burn or tan?, is also a poor proxy. That is a measure of how your skin responds to ultraviolet light, not a measure of hue. Plenty of people with cool undertones tan readily, and plenty of warm-undertoned people burn. Keep the two questions separate.
Getting a reliable reading
Lighting decides the answer more than anything else. Indoor bulbs are heavily tinted: warm incandescent light pushes everything golden and cool white LEDs push everything toward pink. Stand near a window, face away from direct sun, and remove anything strongly colored from your field of view, including a colorful shirt and a painted wall.
Today, wash your face, take a sheet of white paper to a window with the sun off your face, and read the cast; then confirm with a silver and a gold item in the same light. Two tests agreeing is your answer; two disagreeing means redo both, not default to neutral. The undertone test reads the cast from a photo taken in the same conditions and gives the same four-way answer. Deep skin uses the same method; the gap is in the product ranges, not the skin.
FAQ
Common questions
What is the difference between skin tone and undertone?+
Skin tone is surface depth, how light or deep your skin is, and it changes with sun exposure. Undertone is the hue beneath that surface, warm, cool, neutral or olive, and it stays the same year-round.
Can your undertone change?+
Not meaningfully. Tanning changes your depth, not your undertone. Some medications, pregnancy and conditions such as melasma can alter surface pigmentation, but the underlying hue is stable across a lifetime.
What is the most accurate undertone test at home?+
The white-paper test in indirect daylight, on bare skin, with the jewelry test as a second opinion. Both compare your skin against a fixed reference, which is why they beat methods that rely on interpreting your own body.
Can you have no undertone?+
Everyone has one. What people usually mean is neutral, a balance of warm and cool with neither dominating, which is common and simply means most shade families will work on you.