Dead and Stuck Pixel Detection
Easily discover dead (black) or stuck (colored) subpixels on your screen. Pure blue screen highlights and reveals blue subpixel issues on LCD, LED, and OLED displays.
Blue Screen
Free fullscreen blue screen tool for screen testing, ambient lighting, and creative projects
Color Picker
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Click the box above or press Space for fullscreen
Press ESC to exit fullscreen mode
Why Use Blue Screen Tool?
Blue Light Therapy and Alertness
Blue light can help improve alertness, cognitive performance, and focus. Often used in specific light therapies and to boost energy and activity levels.
Video Background and Blue Chroma Key
Sometimes used as a professional alternative to green screen in chroma key (blue screen key), especially when the subject is wearing green or in classic film production.
Color Accuracy and Screen Calibration
Use this pure blue reference #0000FF to check how vibrantly and accurately your screen or TV reproduces blue color. Ideal for professional color calibration and quality testing.
How to Use Blue Screen
- Open the blue screen tool and choose 'Blue' from preset colors or use the color picker to select pure blue #0000FF.
- Click on the blue box or press spacebar to enter full screen mode.
- Adjust the brightness on your device according to intended use (pixel testing, lighting, or chroma key).
- Carefully inspect your screen for pixel issues or prepare your camera for video recording.
- Press ESC to exit fullscreen mode at any time or use the download button to save the image.