12 Test Modules
Solid colors, gradients, gamma curves, contrast, dead pixels, white balance, color checker, sharpness, uniformity, color blindness, response time, and RGB channels.
How to use: Click any color tile to enter fullscreen. Look for uneven brightness, color casts, or dead pixels. A well-calibrated display should show pure, uniform colors with no mottling or backlight bleed.
Steps:
64
Banding test: Smooth gradients indicate good bit-depth. If you see distinct steps (banding) instead of smooth transitions, your monitor may be limited to 6-bit or your color profile may be incorrect. Set steps to 256 for the most sensitive test.
Standard gamma: 2.2 (sRGB) is the standard for Windows & most content. Mac uses ~1.8–2.0. Each row shows a gamma ramp; the midpoint square should appear equal in brightness to the surrounding dithered pattern for correctly calibrated gamma.
Near-black & near-white: You should see all brightness levels separately. If the darkest shades merge into black, lower brightness or check black level settings. If lightest shades merge into white, lower contrast.
Select a color and enter fullscreen. Scan carefully for stuck or dead pixels.
💡 Click the canvas above to enter fullscreen for best results
Neutral grey test: The grey patches should appear perfectly neutral — no color tint. The white patch should be pure white. If greys appear blue, reduce color temperature. If yellow, increase it (target: 6500K for most uses).
Reference patches: Compare these colors against a known reference (Macbeth ColorChecker or Pantone swatches). Hue shifts or saturation errors indicate color profile misconfiguration. Click a patch to see exact target values.
Color:
Uniformity: All cells should appear identical in brightness and color. Dimmer corners or color casts indicate backlight uniformity issues common in VA/IPS panels.
Click the box when it changes color. Tests your screen-to-eye response perception.
Click "Start" below to begin
What this tests: Simulates visual reaction speed. Average human reaction to visual stimulus is 150–300ms. Consistently high times may suggest ghosting or overdrive artifacts on fast-motion content.
Red:
255
Green:
255
Blue:
255
Channel isolation: Each channel ramp should be perfectly smooth from black to full saturation. Any deviation, crossover, or color cast indicates a faulty color circuit or incorrect display profile.