TrueScreenTest

Fullscreen17 patterns

Screen Color Test

Show solid colors, grayscale steps and gradients across your whole screen to look for uneven brightness, color tints and banding. It is a visual check, not a calibration.

Pick any pattern below, or start from the first. Tap or press → for the next, Esc to exit.

Solid colors

Grayscale steps

Gradients

How to use

How to use the screen color test

  1. Turn off night mode, blue-light filters and adaptive brightness so colors aren’t shifted.
  2. Press Start fullscreen test, or tap any tile to start from that pattern.
  3. Step through the patterns by tapping or pressing →. Solid colors come first, then grayscale steps, then gradients.
  4. Compare areas of the screen: corners against the centre, top against bottom. Look for tints, darker patches and visible stripes in gradients.
  5. Exit with the Exit button or Esc.

Controls

Tap / click
Next pattern.
→ ←
Next or previous pattern.
Esc / Exit
Leave the test.
Tiles
Open that pattern in fullscreen.

What each pattern shows

Solid colors

Look for patches that are brighter, darker or tinted compared with the rest of the screen. White and mid gray show uneven backlighting and tints; black shows light bleeding in from the edges.

Grayscale steps

Each of the 16 bars should be distinct from its neighbors and free of a color cast. The near-black and near-white sets use very small steps, so it is normal for the first one or two to merge on many screens.

Gradients

A smooth ramp should change evenly from one end to the other. Visible stripes are called banding. Some banding is normal, especially in the dark part of a ramp.

Hue spectrum

Colors should blend without sudden jumps or a band of one color taking over. It is a quick way to compare two screens side by side.

Getting a fair result

  • Turn off night mode, blue-light filters and adaptive brightness while testing.
  • Let the screen warm up for a few minutes and view it straight on; many panels shift color at an angle.
  • Compare in a dim room for dark patterns and a normally lit room for bright ones.
  • To look for single faulty pixels, the dead pixel test is quicker. To check touch response, use the touch screen test.

Limitations

  • This is a visual check. It cannot measure color accuracy, brightness or contrast, and it is not a substitute for calibration with a hardware colorimeter.
  • Your browser, operating system color management, HDR settings and graphics driver all affect what you see. Gradients may show slightly different banding in different browsers.
  • Phone cameras exaggerate unevenness, so photos of the screen are not a reliable judge.

Questions

Is this the same as a screen colour calibration?

No. Calibration adjusts your display using measurements from a hardware sensor. This screen colour test only shows patterns so you can judge them by eye.

Why do I see a little banding in the gradients?

Most displays and browsers work with 8 bits per color channel, which gives 256 levels per channel. Across a wide screen those steps can be visible, especially in dark tones. Heavy, uneven banding can suggest a display mode or setting worth checking.

Test kit

More screen tests