1.8
2.0
2.1
2.2
2.3
2.4
2.6
Test Information
The Gamma test is an essential precision tool for verifying your display’s “Luminance Curve.” This determines how your screen translates numerical signal color (input) into actual light (output). Incorrect gamma can make an image look “washed out” or “too dark” even if brightness and contrast are theoretically correct.
🏁 The Checkerboard Background: We use a pixel-perfect checkerboard pattern of alternating black and white pixels. This represents a perfect 50% luminance average.
📏 The Solid Strips: These vertical strips display solid colors calculated for specific gamma targets: 1.8, 2.0, 2.1, 2.2, 2.3, 2.4, 2.6.
🎨 Channels (Gray, Red, Green, Blue): Use the buttons in the control panel to switch between color channels. This helps you identify if one specific color sub-pixel has a “gamma shift.”
⬅️➡️ Navigation: Click the background or use the Left/Right Arrow Keys to change color channels.
🌤️ Gamma < 2.2 (e.g., 1.8): Your screen is displaying mid-tones too brightly. Images will look flat and “washed out.” Common on older Macs or monitors in “Office” modes.
🌑 Gamma > 2.2 (e.g., 2.4): Your mid-tones are too dark. This is often preferred for dark-room movie watching but can lead to “shadow crushing” in gaming.
Online gamma calibration tool, gamma 2.2 test, sRGB monitor setup, display luminance curve diagnostic.