View a Full Red Screen with Vibrant Color
An Instant Tool for a Bold Red Display – Enhance Your Screen’s Visual Impact.
Need a full red display? Tap below to enter full-screen mode for an uninterrupted experience.
Specific Screen Defect Tests
Common Uses for a Red Screen
Preserve Night Vision
Red light does not break down rhodopsin, the pigment in your eyes used for night vision. Use this screen when stargazing or navigating a dark room.
Test Red Sub-pixels
LCD and OLED screens create colors using Red, Green, and Blue. This tool isolates the Red sub-pixels, making it easy to spot dead ones (which will look black).
Fix Stuck Pixels
Rapidly flashing a red screen (or cycling colors) can sometimes "unstick" a pixel that is frozen on green or blue. It helps massage the liquid crystals.
Mood & Warning Light
Create a dramatic red atmosphere for photography, or use your phone as a warning signal or brake light in emergencies.
Benefits of ScreenTest.run’s Red Screen
- Instant Access: Runs directly in your browser with no downloads or installations required.
- True Full-Screen Mode: Uses the entire display area (behavior may vary by system and browser).
- Cross-Device Support: Designed with a responsive layout to work smoothly on desktops, tablets, and mobile devices.
- User-Friendly Interface: Clean and intuitive design that requires no setup or learning curve.
How to Get a Full Red Screen?
- Click the Button: Hit "Launch Full Red Screen" above.
- Go Fullscreen: Your browser will cover the entire display.
- Inspect: Look for any black dots (dead pixels) or use it as a light source.
- Exit: Click anywhere or press ESC to return.
Technical Details: The Color Red
- Hex Code: #FF0000 This is the purest digital red (RGB: 255, 0, 0). It activates the red phosphors or sub-pixels at maximum intensity.
- Low Energy (OLED) On OLED screens, red pixels consume less power than blue pixels, making a red screen a more battery-friendly choice for night clocks or always-on displays.
Red Screen FAQs
Is the red screen completely free to use?
Yes. The red screen tool is completely free to use and runs directly in your browser on any modern device.
Does the red screen work on both mobile and desktop devices?
Yes. The red screen is fully responsive and works across modern browsers on mobile phones, tablets, laptops, and desktop computers. Full-screen behavior may vary slightly depending on the device and browser.
What is the hexadecimal color code for red?
The pure red color displayed uses the hexadecimal value #FF0000, which represents the red primary channel in the RGB color model.
Explore More Testing Tools
Explore our full range of testing tools to enhance your device performance and display quality.
Dead Pixel Test
Attempt to fix stuck pixels on your screen using rapid color cycling techniques.
Frame Rate Test
Test your device's rendering performance and measure FPS in real-time with stress testing capabilities.
Refresh Rate Test
Measure your display's actual refresh rate and understand your monitor's capabilities.
Backlight Bleed Test
Test your display for backlight bleeding and uniformity issues with dark patterns.