Use this free contrast test to check your monitor's black level, white clipping, gamma, grayscale smoothness, color bars, and screen uniformity. It is built for gamers, designers, video editors, students, streamers, and everyday users who want a clearer picture without installing calibration software.
The test below shows visual patterns that make display problems easy to spot. Use the pattern menu to switch between contrast steps, near-black levels, white clipping, gamma ramp, color bars, grayscale gradient, and uniformity. For the most reliable result, view this page at 100% browser zoom and run the test in fullscreen mode.
Display tests are sensitive to viewing angle, room lighting, browser scaling, and monitor picture modes. Before judging your screen, give the panel a few minutes to warm up, clean the screen, and sit in your normal viewing position. Keep your eyes level with the center of the panel, especially on TN and VA monitors where vertical viewing angle can change black level and gamma.
Set your operating system to the monitor's native resolution and default color output. Disable extra features such as dynamic contrast, black equalizer, eco mode, automatic brightness, blue light reduction, local dimming demos, and AI picture enhancement while testing. These modes can make a pattern look better or worse than the real panel performance and can hide clipping, crushed shadows, or color shift.
For SDR content, most users should begin with a neutral picture preset, 6500K or warm color temperature, gamma near 2.2, and brightness adjusted to your room. For HDR testing, enable HDR in the operating system first, but remember that simple browser patterns may not fully represent HDR tone mapping. Use this page mainly to identify visible contrast, clipping, uniformity, and banding issues.
A contrast test compares how well your screen separates dark tones from bright tones. Native contrast is the ratio between the brightest white a display can produce and the darkest black it can produce at the same settings. In real use, contrast affects shadow detail in games, black bars in movies, readability in dark themes, and the depth of photos or videos.
The black level pattern checks whether near-black shades are visible. If all dark patches look identical, your brightness may be too low, your gamma may be too dark, or the panel may have black crush. The white clipping pattern checks whether bright highlights remain separate. If the last bright steps merge into solid white, contrast may be too high or the display may be clipping highlights.
Gamma describes how brightness changes between black and white. A common SDR target is around gamma 2.2, which gives balanced midtones for web content and general PC use. If gamma is too high, midtones look dark and shadow detail disappears. If gamma is too low, the picture looks washed out and lacks depth. A gamma ramp and gradient help reveal whether the tone curve looks smooth.
Color bars do not measure professional color accuracy by themselves, but they quickly show extreme channel problems. Red, green, blue, cyan, magenta, yellow, white, gray, and black should look clean and stable. If one color looks dull, tinted, or uneven, check the monitor color temperature, GPU color settings, cable format, and any saturation enhancement features.
Every model is different, but panel technology strongly affects black levels and native contrast. Use this guide to set realistic expectations before comparing your screen with another monitor.
| Display Type | Typical Native Contrast | Strength | Common Issue to Check |
|---|---|---|---|
| IPS LCD | About 700:1 to 1500:1 | Wide viewing angles and stable colors | IPS glow, grayish blacks in dark rooms, edge uniformity |
| VA LCD | Often above 2500:1 | Deeper blacks and stronger movie contrast | Dark smearing, gamma shift off angle, black crush |
| TN LCD | Often 600:1 to 1200:1 | Fast response and low-cost esports panels | Poor vertical viewing angle and color shift |
| OLED / QD-OLED | Pixel-level black, effectively perfect in dark scenes | Excellent black levels, HDR depth, no LCD backlight glow | Brightness limits, ABL behavior, text fringing, burn-in precautions |
| Mini-LED LCD | Depends on local dimming zones | High HDR brightness with improved black levels | Blooming around bright objects and local dimming artifacts |
Near-black squares should not all disappear. If only pure black is visible and the next steps are hidden, raise brightness slightly or choose a less aggressive black equalizer/gamma setting.
Near-white squares should remain separate. If they merge into one white block, reduce contrast or disable dynamic contrast so clouds, snow, UI highlights, and HDR-like bright details are not clipped.
A smooth ramp helps you judge midtone balance. A very dark ramp can hide enemies and shadow detail, while a washed ramp can reduce image depth and make games look flat.
Gradients reveal banding. Clear stripes may come from an 8-bit panel limitation, low-quality GPU output, compressed screenshots, browser color handling, or an over-sharpened picture mode.
Color bars reveal obvious tint, channel imbalance, saturation boost, and incorrect limited/full RGB range. Whites and grays should look neutral, not green, blue, or pink.
Uniform gray or white fields reveal backlight bleed, dirty screen effect, corner tint, clouding, and brightness falloff. Small differences are normal; strong patches may bother editing work.
For competitive games, the goal is not always the deepest black. You need enough shadow visibility to see movement in dark corners without making the whole image washed out. Start with your monitor's standard or sRGB preset, then adjust brightness until the first few black-level steps are barely visible in your room. Avoid pushing black equalizer too high because it can flatten the image and make smoke, fog, and dark textures look unnatural.
For story games and movies, deeper blacks usually feel better. VA, OLED, and Mini-LED displays can look more cinematic, but only when brightness and contrast are not clipping details. If the game has an in-game HDR or brightness screen, adjust it after setting the monitor. Do not fix every title with the monitor menu; many games have their own tone mapping and gamma controls.
For esports, keep response time and visibility separate. A monitor can have fast response but mediocre contrast, or excellent contrast but more dark smearing. If you use a VA panel and notice dark trails behind moving objects, try a lower overdrive level, a brighter dark setting, or a different refresh mode. If you use OLED, keep HUD brightness reasonable to reduce long-term static-image risk.
Creative work needs more than a good-looking image. A monitor can look vivid but still be inaccurate. This online monitor color accuracy checker helps reveal visible problems, but a colorimeter is still the best option for professional calibration. If you edit client photos, print designs, YouTube videos, product images, or thumbnails, use a calibrated profile and check your work on multiple displays.
For SDR web work, sRGB is the safest target because most browsers, apps, and phones are built around it. If your monitor is wide-gamut, colors can look oversaturated unless you use an sRGB mode or color-managed app. For video work, Rec.709 with a suitable gamma is common for SDR. For print, you may also care about Adobe RGB coverage, but contrast and neutral grays still matter because shadow detail influences how edits translate.
Use the grayscale and color bar patterns to check whether whites are neutral and midtones are consistent. If gray steps lean blue, green, or red, adjust color temperature or RGB gain if your monitor offers it. If the display lacks RGB controls, choose the most neutral preset and avoid extreme saturation modes. On laptops, disable adaptive brightness and night light features before making color decisions.
| Problem | What It Looks Like | Most Likely Cause | Try This Fix |
|---|---|---|---|
| Black crush | Dark squares merge together; shadow detail disappears | Brightness too low, gamma too high, black stabilizer too low | Raise brightness a little, choose gamma 2.2, disable aggressive contrast modes |
| Washed-out image | Black looks gray; image lacks depth | Brightness too high, wrong RGB range, low gamma | Lower brightness, set full RGB for PC monitors, use neutral preset |
| White clipping | Bright steps disappear into solid white | Contrast too high or dynamic contrast enabled | Reduce contrast until near-white steps are visible |
| Color tint | Gray or white looks blue, green, red, or yellow | Wrong color temperature or preset | Try warm/6500K, sRGB mode, or manual RGB gain controls |
| Banding | Gradients show visible stripes | Limited bit depth, compression, bad processing, low-quality cable setting | Use native refresh/color depth, disable image enhancements, check GPU output format |
| Uneven screen | Corners, edges, or center look brighter or tinted | Backlight bleed, panel uniformity, pressure, viewing angle | Test in normal lighting, reduce brightness, avoid panel pressure, consider exchange if severe |
Start with the contrast steps, then check black level, white clipping, gamma, color bars, and uniformity. Save your final monitor profile once games, videos, and everyday browsing all look balanced.