Where is the blue light filter?
Every vendor shipped the same warm-tint feature within about two years of each other, and every one of them gave it a different name. We read the settings tree of all 43 systems in the catalogue and recorded where each one keeps it.
What each system calls it
10 of the 43 operating systems in our catalogue have this setting, and between them they use five different labels for it:
| Name on screen | Systems |
|---|---|
| Night Light | 3 |
| Eye Comfort | 2 |
| Night Shift | 2 |
| Reading mode | 1 |
| Night Shift… | 1 |
| Night light | 1 |
The most common is Night Light, on 3 of the 10. If that is not the word on your screen, the table above is the rest of the vocabulary to try.
Some of those rows differ only in capitalisation — 6 spellings for five actual names. We have kept them apart because that is what is printed on the screen, and a settings search that matches case will tell them apart too.
Where it lives on each system
These are the shortest paths from the first settings screen on the newest release of each system. 8 of the 10 are within two taps; the rest sit deeper, and the table shows how much deeper.
| System | Path | Taps |
|---|---|---|
| Android 17 | Display › Night Light | 2 |
| HarmonyOS 6.0 | Display & brightness › Eye Comfort | 2 |
| HyperOS 4.0 | Display › Reading mode | 2 |
| iOS 27.0 | Display & Brightness › Night Shift | 2 |
| iPadOS 27.0 | Display & Brightness › Night Shift | 2 |
| macOS 27 Golden Gate | Displays › Night Shift… | 2 |
| Meta Quest v81 | Display › Eye Comfort | 2 |
| Ubuntu 26.04 LTS | Displays › Night Light | 2 |
| ChromeOS 151 | Device › Display › Night Light | 3 |
| Windows 11 | System › Display › Night light | 3 |
Each system name above opens the real menu in the simulator, so you can walk the path before you touch your own device.
Why the names came out this way
Night Shift is Apple, Night Light is Google and Microsoft, Eye Comfort is Huawei, Reading mode is a third framing entirely. None of them says “blue light filter”, which is what almost everyone searching for it types.
This is the clearest example in the catalogue of a feature where the search term and the on-screen label have nothing in common — and it is worth knowing that all five do the same thing, so finding any one of them is finding the right setting.
Find it on your own device
If your system is not in the table, or the label on your screen is different again, there are three ways through it:
- Search every system at once for a setting by name — it looks inside all 43 trees, not just the one you are holding.
- Open your own system in the settings simulator and click to the screen without changing anything real.
- Follow the step-by-step guide to switching to dark mode, or see where that setting lives on every system.
Related settings in the same part of the menu:
All of it comes from the same catalogue: 43 systems, 135 versions, published as an open dataset.
Try it yourself, on the real menusOpen any of 43 operating systems in your browser and walk the Settings tree exactly as it appears on the device. No download, no account.Frequently asked questions
Where is the blue light filter on most systems?
On 8 of the 10 systems that have it, within two taps of the first settings screen. The most common label is “Night Light”, used by 3 of them. The table above gives the exact path for each system.
Why can I not find it by searching my settings?
Because settings search matches the label your system uses, and there are five different labels in use for this one setting. Searching for the word your previous device used is the single most common reason a setting appears to be missing.
How many systems have this setting at all?
10 of the 43 operating systems we catalogue. The rest either have no hardware for it or fold the behaviour into something else, which is why a feature that feels universal often is not.