Online diagnostic tool

Screen Light Effects

Display full-screen solid and ambient colors

Screen light effects

Open the ambient color surface directly in full screen.

The diagnostic pattern is intentionally hidden on the page and opens only in full screen.

Direct answer

What is the Screen Light Effects Online?

Display full-screen solid and ambient colors

✓ No installation✓ Works in compatible browsers✓ Privacy-focused testing

How to use this test

Display full-screen solid and ambient colors. Enter full-screen mode, use your normal viewing distance and inspect the whole panel. Results depend on your display, browser, scaling and room conditions.

Practical guide

Useful ways to use full-screen color and light effects

Full-screen colors can serve as simple lighting, photography and display-inspection backgrounds. Unlike the diagnostic pixel pages, this tool is also intended for temporary ambient use when you need a clean solid field from the screen.

For a more reliable result

Use white or warm colors as a soft nearby light source at moderate brightness.
Use black to reduce screen light in a dark room or to inspect bright-pixel and edge-light behavior.
Use solid colors behind small products or objects when you need a quick digital background.
Avoid leaving bright static colors on OLED displays for unnecessarily long periods.

What this test cannot confirm

A display is not a calibrated photographic light source, and color output varies between panels and picture modes. For color-critical work, use calibrated lighting and display equipment.

Explore more diagnostics

Choose another test

Move between screen, camera, audio and device checks without returning to the homepage.

View all tests

Complete Screen TestRun pixels, colors, uniformity, contrast, sharpness and motion in one guided check.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.