Gray screen
Click the panel to fill your screen with neutral gray, the best background for spotting uneven light and burn-in.
What people use it for
Uneven backlight
In a dark room, dark gray shows backlight bleed at the edges and cloudy patches across an LCD.
Dirty screen effect
Faint bands across large TVs are easiest to see on flat 50% gray.
Burn-in
Retained logos and taskbars stand out on a solid gray much more than on black.
Neutral reference
Photographers meter exposure off 18% gray; #777777 is about the same tone in sRGB.
Keyboard shortcuts
- F
- Full screen
- Esc
- Exit full screen
- ← →
- Previous / next color
- ↑ ↓
- Brighter / dimmer
Every color
More screen tools
Dead pixel test
Five colors, one at a time, to find dead and stuck pixels.
Refresh rate test
See your screen’s real Hz and spot stutter.
Screen test
Gradients, black level, uniformity, gamma and sharpness.
Test pattern
Color bars and a test card at your native resolution.
Zoom light
A soft, warm light for video calls from a spare screen.
Background images
Plain color PNGs for desktops, phones and 4K.
Questions
Gray or grey?
Same color. Gray is the American spelling, grey the British one.
What is the dirty screen effect?
Faint vertical or horizontal bands on big LCD and OLED TVs, most visible in camera pans across sports fields. A flat gray screen shows them clearly.