Gray gradient banding on a monitor: how to test

You are shading a digital painting and a smooth gray transition looks like a stack of visible stripes. Before changing your artwork, check whether the bands are in the image, caused by display settings, or visible only on one monitor.

The Display Test can help you inspect color behavior and compare screens. Use it alongside the same smooth grayscale gradient in your art app, since a color test checks the display but cannot tell you whether a particular image file already contains banding.

Check a gray gradient

1. Open the Display Test on the screen you want to check. Use its color test to look for gray tint or uneven patches, and note which display you are viewing if you have more than one.
2. Open a smooth grayscale gradient in the art app where you noticed the problem. Use an uncompressed or lossless source rather than a small JPEG, and keep the same image for every comparison.
3. View the gradient at its normal size and at 100% zoom. Look for clear steps between gray tones, especially across broad, gradual transitions. Avoid judging it from a thumbnail or a scaled preview.
4. Repeat the check with the same image in another app or browser, then on a second screen if available. Keep the room lighting and screen brightness similar so the comparison is useful.

Do not change several display settings before the first check. A simple baseline makes it easier to see which change helps.

What the result means

The bands stay in the same places in different apps and on different screens

The image may contain visible steps already, or the gradient may be limited by its color depth. Check the original file at 100% zoom. If the bands are present there too, changing the monitor is unlikely to remove them. Try a smoother source or rebuild the gradient in your art app.

The gradient looks different in another app

The app may be handling color differently, or a display setting may be affecting its appearance. If the same file looks smooth in one app but banded in another, investigate the app's color settings and whether it uses the monitor's color profile.

The bands appear on one monitor but not another

The first monitor, its connection, or the graphics output path may be limiting the number of displayed tones. Check the screen's color settings and test it with a direct connection instead of a dock or adapter.

The gray color test looks uneven even without a gradient

Uneven patches, a color cast, or brightness changes across a plain test color point to a different issue from gradient banding. The panel, its picture mode, or its calibration may be affecting the gray. A browser test can help you spot the pattern, but it cannot calibrate the monitor or confirm the cause.

How to reduce or isolate the banding

1. Check the source image. Open the same gradient in another app and inspect it at 100% zoom. If it is a JPEG or has been resized repeatedly, try an original or lossless copy. Compression and resizing can introduce visible steps.
2. Turn off appearance filters temporarily. On Windows 11, go to Settings › System › Display and switch off Night light and Use HDR for a baseline check, if those options are available. On macOS, open System Settings › Displays and temporarily turn off Night Shift and True Tone if shown. These features can change how gray looks, though they do not necessarily create the bands in the image.
3. Check the active display mode. On Windows 11, open Settings › System › Display › Advanced display and confirm that the correct screen is selected and using its recommended resolution. Note the listed color depth or format if Windows shows it. On macOS, open System Settings › Displays and select the display to check its resolution and color profile.
4. Use a suitable color profile. On Windows 11, check Settings › System › Display › Color profile, if available, and use the profile intended for that monitor. On macOS, choose the monitor's appropriate profile in System Settings › Displays. A profile affects how colors are interpreted, so do not switch randomly between profiles to hide the bands.
5. Bypass the dock or adapter. Connect the monitor directly to the computer with a known-good cable, if possible, then check the same gradient again. A different connection can change the available resolution, refresh rate, or color output.
6. Compare with another screen or device. If the same image looks banded on one monitor after these checks but smooth on another, the first monitor or its signal path is a stronger suspect. If both show the same bands, revisit the image and app before assuming the panel is faulty.

When the monitor may need service

A gradient test cannot prove that a panel is defective. Look for repeatable results: the same banding appears on that monitor with multiple smooth sources and apps, while the same setup looks better on another screen. Try a different cable and a direct connection first. If the problem remains, photograph the display with the gradient visible and contact the manufacturer or seller about inspection, repair, or warranty coverage.

Why smooth gradients can show steps

A digital image represents color in discrete values. An 8-bit channel, for example, has 256 possible levels. A gradual transition can show visible steps if the source has too few tones, if processing reduces the available levels, or if the display cannot render the transition smoothly. Dithering, which adds a fine pattern to make transitions appear smoother, can reduce the effect, but it cannot restore detail that was discarded earlier.

Judge the image at its intended viewing size and under steady lighting. A browser-based color test is a useful visual check, not a substitute for a calibrated reference display or a professional measurement.