To turn on the blue light filter in Windows 10, select Start > Settings > System > Display and switch Night light to On. To turn it off, switch it to Off. Select Night light settings to change how warm the screen gets and when it turns on.
Applies to: Windows 10. Checked against Microsoft Support on September 25, 2026.
Turn Night light on or off
- Select Start > Settings > System > Display.
- Under Brightness and color, switch Night light to On or Off.
You can also select the Night light button in the action center. Press Windows logo key + A to open it.
Change the strength and schedule
- On the Display page, select Night light settings.
- Drag the Strength slider. Further right is warmer and removes more blue light.
- Switch Schedule night light to On.
- Choose Sunset to sunrise, or choose Set hours and pick your own times.
Sunset to sunrise needs location services turned on so Windows knows your local times.
If Night light doesn’t work
- The switch is grayed out: update your display driver, then restart. See how to update all drivers on Windows 10.
- It won’t turn off or stays yellow: switch Schedule night light off, then switch Night light off.
- Sunset to sunrise is missing: turn on location in Settings > Privacy > Location.
- Colors still look warm with it off: check your monitor’s own color or eye-care mode.
Frequently asked questions
Does Night light affect screenshots?
No. Screenshots and screen recordings keep their normal colors.
How do I make the screen dimmer too?
See how to change the brightness in Windows 10. To choose when the screen turns off, see how to change the screen timeout in Windows 10.
You can also turn Night light on or off from the quick actions in Action Center. See how to open Action Center in Windows 10.
Microsoft’s guide is Change display brightness and color in Windows. More help is on our Windows Help & Guides page.
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