Gradient Banding Test: How to Detect Color Banding on Your Monitor
You have seen it — a sky in a photo that should smoothly fade from deep blue to pale horizon, but instead shows visible stripes of color like steps on a staircase. That is color banding, and your monitor might be causing it even if the original image is fine. A gradient banding test reveals whether your display can render smooth color transitions or if it is hiding banding problems that affect your photo editing, video work, and gaming.
What Is Color Banding?
Color banding occurs when a display cannot render enough distinct shades between two colors, causing smooth gradients to appear as visible bands or steps. Instead of 256 smooth steps from dark to light, you might see only 32 visible bands — each band a noticeably different shade.
Banding happens because of:
Insufficient bit depth: 6-bit panels (262,144 colors) band more than 8-bit (16.7 million) or 10-bit (1.07 billion) panels.
Poor gamma calibration: Incorrect gamma curves compress certain tonal ranges, reducing available shades in shadows or highlights.
Compressed content: Highly compressed JPEG images and 8-bit video files contain banding in the source material — unrelated to your monitor but visible when the display cannot smooth it.
GPU driver settings: Incorrect color range settings (limited vs full RGB) in graphics drivers can cause banding on gradients.
Running a Gradient Banding Test
Step 1: Open the Gradient Test
Navigate to our Gradient Test tool and enter fullscreen. The test displays smooth gradients across the color spectrum — gray ramps, color transitions, and radial gradients designed to expose banding.
Step 2: Evaluate Gray Ramps
Gray gradients are the most revealing banding test. Look at smooth transitions from black to white:
- Smooth transition: Your panel handles gradients well
- Visible horizontal bands: Panel bit-depth or gamma issue
- Color tinting in gray: Color accuracy problem (gray gradient should stay neutral)
Step 3: Check Color Gradients
Color gradients (red to black, blue to white, full spectrum) reveal banding in specific color channels. Banding visible in one color but not others indicates a problem with specific sub-pixel channels.
Step 4: Compare at Different Brightness Levels
Run the Gradient Test at 50%, 70%, and 100% brightness. Some panels show banding only at specific brightness levels due to backlight PWM dimming or panel characteristics.
Fixing Banding Issues
Software Fixes
Enable 10-bit color: If your monitor and GPU support it, enable 10-bit output in graphics driver settings (NVIDIA Control Panel → Change resolution → Output color depth → 10 bpc).
Disable GPU color compression: Some GPU drivers compress color output. Set color range to "Full" (0-255) rather than "Limited" (16-235) in AMD/NVIDIA settings.
Use calibration software: Hardware calibrators create profiles that optimize gamma curves to minimize banding.
Hardware Considerations
FRC (Frame Rate Control): Many 8-bit panels use FRC to simulate 10-bit color by rapidly cycling pixels. FRC can cause subtle flickering but reduces banding.
Panel quality: IPS and VA panels at 8-bit native show less banding than TN panels. Professional monitors with true 10-bit panels show the least banding.
Source content: If banding appears in specific images but not in the gradient test, the banding is in the source file — not your monitor.
Who Needs Gradient Testing?
Photographers and Retouchers
Banding in monitor gradients means banding in your edited photos goes undetected until printed or viewed on a better display. Test your editing monitor before important projects.
Video Editors and Colorists
Video gradients (skies, studio backgrounds, color grades) are banding hotspots. A Gradient Test on your reference monitor ensures your grades are clean.
Gamers
Banding in dark game scenes (shadows, night skies, fog) reduces visual quality. If you notice banding in games, run a gradient test to determine if it is your monitor or the game engine.
New Monitor Buyers
Run gradient test within your return window. Severe banding on a new monitor may indicate a defective panel worth returning.
Combining with Other Display Tests
Complete display evaluation includes:
- Pixel Test for dead and stuck pixels
- Gray Screen for neutral color reference
- Gradient Test for banding
- Refresh Rate Test for motion clarity
Run all four on any new display purchase.
Banding in HDR and Wide Gamut Content
HDR content and wide gamut displays can reveal banding that SDR content hides. If you edit HDR video or photos, run our Gradient Test in both SDR and HDR modes (if your monitor supports HDR) to evaluate banding across the full tonal range you actually work in.
10-bit panels show significantly less banding in HDR workflows. If banding appears only in HDR content on an 8-bit panel, upgrading to a 10-bit display may be necessary for professional HDR work.
GPU Settings That Cause False Banding
Before blaming your monitor, verify GPU settings: incorrect color range (Limited vs Full RGB), dithering disabled, or color depth set to 6-bit can all cause banding that disappears when settings are corrected. Reset GPU color settings to defaults, rerun the gradient test, then adjust incrementally.
Related tools: Gray Screen · Pixel Test · Refresh Rate Test · Black Screen