White
Best for dark pixels, dust, tint and brightness uniformity.
Screen Color Tools
Open clean full-screen colors for dead-pixel checks, backlight inspection, uniformity testing, lighting and camera backgrounds.
Choose a screen color
Each page opens quickly, supports full screen and includes device-specific testing guidance.
White Screen#FFFFFF · Full-screen toolBlack Screen#000000 · Full-screen toolRed Screen#FF0000 · Full-screen toolGreen Screen#00FF00 · Full-screen toolBlue Screen#0000FF · Full-screen toolGray Screen#808080 · Full-screen toolYellow Screen#FFFF00 · Full-screen toolOrange Screen#FF7A00 · Full-screen tool
Why use several full-screen colors?
Different display defects become visible on different backgrounds. A complete visual check should include black, white, red, green, blue and gray rather than relying on only one color.
✓ Pixel inspection✓ Uniformity checks✓ No installation
Which screen color should you choose?
Black
Best for bright pixels, backlight bleed, glow and image retention.
Red, green and blue
Best for checking primary subpixel behavior and stuck pixels.
Gray
Best for dirty screen effect, banding and subtle color tint.
Frequently asked questions
Which color is best for finding dead pixels?
Use several colors. White is useful for dark pixels, black for bright pixels and light leakage, while red, green and blue isolate primary subpixel behavior.
Do these pages change hardware brightness?
No. They render a web color. Adjust physical brightness with your device or monitor controls.
Can screen color pages calibrate a display?
No. They are visual inspection utilities. Calibration and objective color measurement require appropriate hardware and reference software.
Explore more diagnostics
View all testsChoose another test
Move between screen, camera, audio and device checks without returning to the homepage.
Dead Pixel TestInspect solid colors for dead, stuck, bright or dark pixels.
Touch Screen TestCheck touch coverage, dragging continuity and dead zones.
Keyboard TesterTest a full-size keyboard and confirm every key press.
Mouse TesterTest buttons, wheel, movement, dragging and double-clicks.
Audio TesterCheck speakers, stereo channels, tones and microphone input.
Camera & WebcamTest built-in, USB, phone, tablet and compatible TV cameras.
Microphone TesterView microphone levels, waveform, recording and playback.
Pixel ExerciserExercise a suspected stuck-pixel area with changing colors.
Gradient TestInspect gradients, tonal transitions and visible banding.
Brightness & ContrastCheck black levels, white saturation and contrast separation.
Screen Size TestView viewport, resolution, pixel ratio and display data.
Text SharpnessInspect text rendering, browser scaling and clarity.
Motion & GhostingObserve motion blur, ghosting and response behavior.
Resolution & ScalingCheck screen resolution, CSS pixels and scaling.
Device InformationReview screen, browser, hardware and platform information.
Browser CapabilityCheck which browser APIs and hardware features are supported.
Network TestCheck connection status, latency and estimated download speed.
GPS & LocationTest browser geolocation, accuracy, altitude and speed.
Sensor TesterTest orientation, motion, acceleration and rotation sensors.
Multi-Touch TesterTrack multiple touch points, pinching and rotation gestures.Screen Color ToolsOpen exact full-screen color pages for pixel, uniformity and lighting checks.Response Time TestObserve ghosting, blur and pixel-transition behavior at several speeds.Stylus Drawing TestCheck pen, touch, pressure, tilt and drawing continuity in your browser.
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