Full Red Screen
1-click full red screen. Test your monitor's color accuracy or use as a darkroom light.
Click for Fullscreen
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About Full Red Screen
Red light preserves your night vision. Use our full red screen tool if you are doing astronomy, working in a darkroom, or simply need to read something in the dark without resetting your eyes' adaptation to low light. It's also used to test the red sub-pixels on your display.
How to use the Fullscreen Tool
Click the "Fullscreen Preview" button above. Your browser will hide all UI elements and display the pure color. This is perfect for:
- Finding dead or stuck pixels on your monitor.
- Checking for backlight bleed on LCD panels.
- Using your screen as a makeshift light source or reading light.
- Cleaning your display (dust is easier to see on a solid color).
To exit, simply press the ESC key or tap the screen on mobile.