Yellow screen
Click the panel to fill your screen with yellow. On a screen, yellow is red and green light together.
What people use it for
Warm fill light
Pale yellow adds a sunny warmth to photos and video without the orange cast of a low color temperature.
Check red and green subpixels
Yellow lights only red and green; a missing one shows as a green or red dot.
Color card
A bright card to wave on a stream, in a classroom or across a room.
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
Why does yellow look different on my phone and monitor?
Displays differ in color range and calibration, so the same #FFFF00 can look greener on one screen and warmer on another.
How do I make it softer?
Pick pale yellow, or lower Brightness.