Free · runs on your device
Undertone from a photo, on your device
Undertone is the hue under the surface color. This samples the cheek and sorts warm, cool, neutral, and olive instead of forcing a two-way choice.
The vein and jewelry quiz is still here for days you do not want to use a photo.
- Cost
- Free
- Time
- Under a minute
- Signup
- None
- Data
- Stays on device
Your photo
Add a photo to measure
Face the camera straight on, hair off the face, even light, no filter.
- 1Add your photoCamera or a file. Either stays on this device.
- 2Mapped in your browser478 landmarks find the zones. The picture is not uploaded.
- 3Your measured resultNumbers from this photo, drawn on the picture.
Add a photo. It stays in this browser.
- On-device, never uploaded
- 478 landmarks
- Free, no signup
In the app
Want a record of undertone from a photo, not a one-off?
Undertone from a photo on this page is a single reading. The app saves a scan and the routine that followed it, so the next photo has a baseline.
- Six saved scores: hydration, texture, tone, acne, pores, and redness
- A morning and evening routine built from the scan
- The same face, week after week, so a change shows up as a trend
Scan with your phone. iPhone opens the App Store. Android opens Google Play.
The science
What undertone from a photo measures, and how this page does it
- 01
One question, answered from this photo
Undertone from a photo uses the face in the frame, not a questionnaire. A cool, neutral, or warm lean from the balance of a* and b* on the cheek, which is the red-green and yellow-blue axes of Lab.
- 02
Landmarks first, then the number
The photo is drawn to a canvas in your browser. A face landmark model marks 478 points so the measurement uses the face, not the background. Nothing is uploaded.
The same cheek patches as the tone tool. More b* relative to a neutral leans warm. More relative blue leans cool. Jewelry and vein quizzes on this site are the no-photo cross-check.
- 03
The result on this page, and the record in the app
A cool, neutral, or warm lean from the balance of a* and b* on the cheek, which is the red-green and yellow-blue axes of Lab.
The AISkincare app keeps a scan: hydration, texture, tone, acne, pores, and redness, then builds a morning and evening routine from those scores. This page answers once and does not store the photo.
- 04
What will throw the number off
This is a cosmetic reading of one photo on your device. Lighting, lens, and angle change the numbers. It is not a diagnosis or a clinical measurement.
Undertone is not depth. A deep complexion can be cool, and a light one can be warm. Makeup lighting in the room is the usual reason the lean flips between photos.
How to read a undertone from a photo result
The same cheek patches as the tone tool. More b* relative to a neutral leans warm. More relative blue leans cool. Jewelry and vein quizzes on this site are the no-photo cross-check.
Use the steps under the tool as the procedure: same light, same distance, same expression, whenever you want a second reading to mean something. The app is where a series of scans can sit next to a routine. This page is the single measurement.
A setup that makes a second photo comparable
Daylight from a window, phone at eye level, an arm's length away, hair off the zones the tool needs, no beauty filter. Tilt in the chin or a camera held low changes several face measurements at once.
If the page warns that the photo looks angled, or that a distance falls outside a usual range, retake before you act on the figure.
One photo is a point. A month is a line.
Undertone from a photo on a Tuesday includes the light in the room. The same check in the same window next month is the comparison that can show a change. Stacking random selfies from different rooms mostly shows the rooms.
Scan the QR code under the tool with the phone you will keep using. An iPhone is sent to the App Store and an Android phone to Google Play, so the history starts in the right store.
What undertone from a photo will not claim
Undertone is not depth. A deep complexion can be cool, and a light one can be warm. Makeup lighting in the room is the usual reason the lean flips between photos.
This is a cosmetic reading of one photo on your device. Lighting, lens, and angle change the numbers. It is not a diagnosis or a clinical measurement.
How to use the result
- Use a photo taken by the rear camera, or by someone else, at arm's length.
- Face the light. Do not use a portrait filter.
- Keep hair off the forehead if you want the outline and thirds to settle.
Where to go from here
If one part of the result stood out, open the tool that asks only that question. Each one states its limit in the same place, and each one links back to a guide when a longer explanation helps.
- Color season from a photoCombine depth, undertone, and hair-to-skin contrast from a photo into a spring, summer, autumn, or winter direction. Measured in the browser.
- Undertone quizUse jewelry, veins, and how skin looks in sun to estimate warm, cool, neutral, or olive undertone for makeup and hair color.
- Vein and jewelry quizThe classic vein, jewelry, and white-shirt check, written so neutral and olive are possible answers instead of a forced warm or cool.
- Color season quizPlace yourself in a four-season palette from depth, undertone, and contrast. Twelve-season systems can wait until these four feel right.
This is a cosmetic reading of one photo on your device. Lighting, lens, and angle change the numbers. It is not a diagnosis or a clinical measurement.