How to use it
- Pick a color: white, warm or cool white, black, a preset or your own.
- Set the dimming level if full brightness is too much.
- Tap the preview to open it full screen.
- Move the mouse or tap to show controls; press Esc or Exit to close.
Ways to use a white screen
- Soft light: light your face on a video call, read a paper map in the car, or find something under the bed.
- Makeup and selfies: a laptop screen in white at full brightness makes a surprisingly good fill light.
- Cleaning the display: dust, smudges and fingerprints are easiest to see on black, streaks on white.
- Monitor checks: look for backlight bleed on black and uneven brightness on gray or white.
- Tracing: place thin paper on a tablet showing white to trace drawings, carefully and without pressing.
- Photography: a colored screen can serve as a quick background or a colored light for small objects.
Colors and dimming
Choose from presets, including warm white (slightly orange, kinder to the eyes in the evening) and cool white (slightly blue, crisp like daylight), or pick any color with the custom color picker. The dimming slider darkens the screen in 5% steps up to 90% without changing your system brightness, handy for a gentle night light.
In full screen, the controls fade after a few seconds so you get a pure, uninterrupted color. Move the mouse or tap to bring them back, change the color with the color dots, or adjust dimming.
Choosing the right color
| Color | Good for |
|---|---|
| White | Maximum light, tracing, spotting streaks |
| Warm white | Reading light or night light that is easier on the eyes |
| Cool white | Daylight-like light for makeup and product photos |
| Black | Cleaning the screen, testing backlight bleed, a dark screen for OLED |
| Red | A dim light that preserves night vision for stargazing |
| Green, blue, yellow | Colored lighting effects and monitor checks |
Red light at low brightness is a common trick among amateur astronomers, because it disturbs dark-adapted eyes less than white light.
Getting the brightest possible light
The color on screen can't be brighter than your display allows. For maximum light:
- Turn display brightness all the way up (on a phone, swipe down for quick settings).
- Turn off auto-brightness, which may dim the screen in a dark room.
- Turn off Night Shift, Night Light or other blue light filters, which tint white toward yellow.
- Keep dimming at 0% and open full screen.
OLED phones and newer laptops can get quite bright, but expect a screen to work as a soft fill light, not a flashlight.
The screen stays awake
While the full-screen color is open, the tool asks the browser to keep the screen on (Screen Wake Lock), so it won't dim or lock after a minute. When this works, the control bar shows "Screen will stay awake". Some browsers don't support it; in that case, temporarily set a longer screen timeout in your device settings.
A bright white screen uses more battery than normal use, especially on phones. Plug in if you need light for a long time.
Related tools
To check for dead or stuck pixels, use the dead pixel test, which cycles colors automatically. To use your camera as a mirror with a built-in ring light effect, open the online mirror.
Frequently asked questions
How do I make my screen white?
Choose White and tap the preview. The page goes full screen with a solid white color. Press Esc or tap Exit to close.
Can I use my screen as a light?
Yes. Set brightness to maximum, turn off night mode and auto-brightness, and open the white screen in full screen.
Will my screen turn off while it's open?
The tool asks the browser to keep the screen awake. If your browser doesn't support that, change the screen timeout in your device settings.
Can I choose a different color?
Yes. Use one of the presets or the custom color picker, and dim it with the slider.
Is a black screen useful?
A black screen makes dust and smudges easy to spot when cleaning, and it shows backlight bleed and stuck pixels.
Last updated: November 12, 2026