HOW TO USE

1) Press START (loads the gradient)

2) Optional: FULLSCREEN for best visibility

3) Switch RAMP to test each colour channel

4) Change DIR to spot directional artifacts

5) Exit: ESC or tap/click screen

WHAT YOU'RE LOOKING FOR

Smooth: a continuous fade with no visible steps.

Banding: distinct stripes across the ramp.

Blotches: patchy areas = compression or processing.

Tint: grey ramp should not lean red/green/blue.

BEST RESULTS

Use native resolution (no browser zoom).

Disable “dynamic contrast” / “vivid” picture modes.

Try multiple brightness levels (some panels band more at low).

FAQ

Is banding always a fault? not always — it can be content/compression.

Why does it change with brightness? some panels use different dimming methods.

Why is red worse? channel precision + processing differs by device.

Can I fix it? try different picture modes, reduce sharpening/contrast.

TV / MONITOR TIPS

TVs: enable “Game/PC mode” to reduce processing.

Monitors: check 8-bit vs 10-bit output if supported.

Browsers: avoid zoom; it can introduce resampling.

SAFETY

No flashing here, but avoid long max brightness use.

OLED: don’t leave bright ramps on for hours.

MINI BLOG

Banding is easiest to spot on smooth gradients — especially in dark tones.

If the grey ramp shows stripes, try a different picture mode and lower contrast slightly.

Testing each colour channel helps separate display limits from content compression.

RELATED PAGES

766 Gradient Test • 768 Checkerboard Pattern

761 Black • 762 White • 763 Red

KEYWORDS

banding test • gradient banding • posterization test

colour banding screen • display gradient test