Monitor Grayscale & Black Level Test
Test monitor contrast, color banding, and black level limits. Includes 256-level gradient chart and OLED black level challenge.
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Grayscale & Black Level Test
Test monitor contrast, banding, and black level limits.
Standard Chart
View 256-level grayscale ramp to check for banding and white saturation.Black Level Challenge
Game mode: Find the faintest hidden square. OLED/10-bit recommended.Turn off lights! Clicking the wrong area ends the test immediately.
About Monitor Grayscale & Black Level Test
Two Testing Modes Available
Evaluate your monitor's grayscale performance with our "Standard Mode" and "Challenge Mode".
1. Standard Chart
- Banding: A high-quality monitor should render smooth, silk-like transitions. Distinct vertical lines indicate low color depth or poor Gamma calibration.
- Contrast: You should distinguish between white (255) vs near-white (254), and black (0) vs near-black (1). Merging indicates "Black Crush" or overexposure.
2. Black Level Challenge
A gamified test for OLED and Mini-LED to test extreme shadow details.
- Spatial Dithering: In "Hell" levels, we simulate brightness below RGB(1,1,1) using algorithms. This showcases the true power of self-emissive pixels.
Best Environment
Perform the challenge in a pitch-black room to avoid ambient reflections.