What color is each weekday?
Good to know
Some people see Monday as a color. When weekdays carry a color on their own, researchers call it synesthesia, and studies estimate that about 4% of people have some type of it (Simner et al., 2006, Perception). To check whether a color is stable, researchers ask again in a shuffled order. Here you can pick a color for Monday through Sunday in about a minute, retry in shuffled order to see how many days match, save a 1080×1920 lock screen strip or a 1080×1350 card, and send a link that a friend can open only after picking their own colors. It is a game, not a diagnosis, and nothing is uploaded.
The 24 colors you can pick
These are the colors, names and codes used in the tool. The same name can look a little different from screen to screen.
| Color name | Color code |
|---|---|
| red | #d93a3a |
| vermilion | #e8613c |
| orange | #f08c2e |
| yellow | #f5c623 |
| lemon | #f2e45c |
| lime | #a8cf4f |
| green | #3f9e4d |
| forest | #2f5e3a |
| mint | #8fd6bf |
| teal | #2a9d9a |
| sky | #8cc6ec |
| blue | #2f6fd0 |
| navy | #24356e |
| purple | #7b4bb3 |
| lavender | #b9a3dd |
| plum | #9c2f6b |
| pink | #f19bb5 |
| apricot | #f6b98e |
| beige | #e6d4b4 |
| earth brown | #8a5a3b |
| cocoa | #4f3326 |
| gray | #9a9a9a |
| black | #222222 |
| white | #f7f5f0 |
How the consistency score works
On the second pass both the weekday order and the swatch order are shuffled, and your first picks are hidden. Memory still helps if you retry right away, so trying again a day later gives a fairer result. The number of days that keep their color sets the line below.
| Days that match | Your line |
|---|---|
| 6–7 | Same again after shuffling. Memory or synesthesia, your weekday colors hold |
| 4–5 | Mostly the same. Your weekdays have colors |
| 2–3 | A few weekdays keep their color |
| 0–1 | Different every time. Mood comes before weekdays for you |
How to use it
- 1
Pick the color that comes to mind for Monday through Sunday from the 24 swatches. If a day has no color, tap No color.
- 2
After you tap a color, a row of five shades appears. Tap one to go lighter or deeper, and tap any day in the strip above to change it later.
- 3
Save your lock screen strip or card, or tap Retry shuffled to pick again in a shuffled order and see how many days match.
- 4
Tap Friend link to get a link. Your friend picks their own colors first, then sees which weekdays you match on.
FAQ
What does it mean if weekdays have colors?
When days, numbers or letters carry colors of their own, that is called synesthesia. It is not an illness; it is one way a brain ties information together. Weekday colors are common, and the colors differ from person to person. This page is a game that turns your colors into one picture.
How is the same-color score calculated?
A day counts as the same when you pick the same swatch both times and the shade is at most one step apart. Close neighbors like red and vermilion are different swatches, so they count as different. A color on one try and No color on the other counts as different, and days with No color on both tries are left out. If fewer than 4 days are left, you only see the score.
Does a low score mean I do not have synesthesia?
This tool cannot diagnose anything. Real studies repeat a consistency test several times, such as the Synesthesia Battery (Eagleman et al., 2007). Mood and the day you take it can change your answers, so a low score is not a problem. Treat it as a game.
How does the friend link work?
Your colors travel only in the part of the link after the hash. Nothing is stored on a server, and the friend who opens the link has to pick their own colors before yours are shown. If you add a name it travels with the link; leave it empty and the link says A friend.
What size is the lock screen image?
The lock screen strip is a 1080×1920 PNG and the result card is a 1080×1350 PNG. On phones the share sheet opens; on computers the file downloads.
Where are my picks saved?
Only in this browser. When you come back, your last result is shown again, and nothing is sent to a server. The name is optional and also stays in this browser.
Can I do numbers or months too?
For now this tool is weekdays only. Pick colors for the seven days from Monday to Sunday, and reshuffle if you want a second pass.
What if no color comes to mind?
Tap No color. A day with no color still counts as answered, and if you pick No color both times it counts as the same day. When comparing with a friend, a day where you both picked No color is not counted as a match.
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