Monitor Color Test
Solid fills help you judge color tint, gradient compression, and panel tinting. Fullscreen a swatch and view from a normal seating distance in a dim room for best results.
Cómo usar
- Click a solid color swatch to fill the staging panel, then use Fullscreen so browser chrome does not bias your view.
- Cycle red, green, blue, white, and black full screen to reveal dead or stuck pixels and any color tint.
- Step through the grayscale ladder to check for banding and uneven brightness from near-black to near-white.
Preguntas frecuentes
How do I do a monitor color test online?
Pick a solid color, click Fullscreen, and inspect the whole panel. Cycle through red, green, blue, white, and black, then walk the grayscale ladder. Any speck, tint, or visible step is a defect or calibration issue. Everything runs in your browser.
How do I check for dead or stuck pixels?
Display each solid color full screen and look for dots that stay black (dead) or stuck on one color. A red, green, or blue fill makes a stuck pixel of the opposite color easy to spot against the uniform background.
What is color banding?
Banding is visible steps in what should be a smooth gradient, caused by limited bit depth or aggressive scaling. The grayscale ladder in this monitor color test makes banding near black and white easy to see.
Does this work on phones and TVs?
Yes. The screen color test fills any display in a modern browser — desktop monitors, laptops, phones, tablets, and most smart TVs. Use Fullscreen for the most accurate result.
Can I use this to calibrate my monitor?
It is a qualitative aid: great for spotting tint, banding, and dead pixels and for confirming OSD or ICC tweaks. For absolute color accuracy you still need a hardware calibration probe.
Is anything uploaded?
No. All colors are rendered locally in your browser. Nothing is sent to a server.
Introduction
This monitor color test online fills your screen with pure solid colors and a fine grayscale ladder so you can check display quality with your own eyes. It is the fastest way to hunt for dead pixels, color tint, and banding on a monitor, laptop, phone, or TV — free, in the browser, with nothing to install.
A clean screen color test matters when you buy a new panel, accept a used device, or calibrate a display. Defects that are invisible on a busy desktop jump out against a single uniform color, and brightness or bit-depth problems become obvious on a grayscale ramp.
How to run a monitor color test
- Click a solid swatch (start with red, green, then blue).
- Press Fullscreen so the toolbar and desktop do not distort your perception.
- Scan the whole panel for specks (dead/stuck pixels) and uneven tint.
- Switch to white and black to check uniformity, then step through the grayscale ladder.
What to look for
| Pattern | What it reveals |
|---|---|
| Solid red / green / blue | Dead or stuck pixels stand out as off-color dots. |
| Full white | Tint casts, dirty-screen effect, and bright-spot uniformity. |
| Full black | Backlight bleed, glow, and stuck-on pixels. |
| Grayscale ladder | Banding, crushed shadows, and clipped highlights. |
Common use cases
- Inspecting a new monitor — verify there are no dead pixels before the return window closes.
- Buying used hardware — check a phone or laptop screen for tint and pixel defects.
- Calibration passes — confirm OSD or ICC adjustments actually reduce a color cast.
- Comparing panels — judge tint and grayscale behavior across OLED, IPS, and TN displays.
Best practices
- Always use Fullscreen and dim the room for the most honest result.
- View the screen straight-on; tint and brightness shift with viewing angle, especially on TN panels.
- Let the display warm up a few minutes before judging color.
- Pair this with the black level test, white level test, and screen uniformity test for a full display check.