Color Accuracy Test
Evaluate your display's color quality. This test analyzes grayscale gradient smoothness, contrast discrimination, and detected color gamut to help you understand your monitor's color performance.
Browser PrecisionMedium
Display-dependent estimate using canvas pixel analysis
Frequently Asked Questions
What does the color accuracy test measure?
The test evaluates four key aspects of your display: grayscale gradient smoothness (whether the browser's color pipeline preserves all 256 gray levels), contrast discrimination (how many adjacent shades the canvas can distinguish), color gamut coverage (estimated sRGB, Adobe RGB, and DCI-P3 percentages), and pipeline Delta-E (color difference measured through the browser's rendering pipeline).
Do results vary between browsers?
Yes, results can vary slightly. Different browsers use different rendering engines and color management pipelines. Chrome and Edge apply color management on supported displays, while Firefox handles it differently. For the most consistent results, test in the same browser and avoid changing display settings between tests.
How can I improve my display's color accuracy?
Start by adjusting your monitor's built-in color temperature to 6500K (often labeled 'sRGB' or 'Standard' mode). Disable any dynamic contrast or eco modes. For professional work, consider using a hardware calibrator to create a custom ICC profile. Also ensure your operating system's night light or blue light filter is turned off during testing.
What is Delta-E and what does the pipeline measurement mean?
Delta-E (ΔE) measures the difference between a reference color and the color actually produced. A ΔE below 1.0 is imperceptible to the human eye; below 2.0 is considered professional grade. The pipeline Delta-E measures the browser's color rendering accuracy by writing reference colors to a canvas and reading them back — it captures how the browser's color management affects output, not the display's inherent accuracy.
What is color banding and why does it matter?
Color banding occurs when smooth gradients show visible steps or stripes instead of a seamless transition. It happens when the display or color pipeline cannot reproduce subtle shade differences. The test renders a 256-step grayscale gradient and checks how many steps are lost or distorted. Fewer banding jumps indicate a cleaner color pipeline — important for photo editing, video grading, and design work.
How is color gamut coverage estimated?
The test uses the CSS color-gamut media query to detect whether your display supports sRGB, Display P3, or Rec2020 color spaces. Based on the detected gamut level, it estimates the percentage coverage of sRGB, Adobe RGB, and DCI-P3 color spaces. For example, a P3-capable display typically covers ~100% sRGB, ~88% Adobe RGB, and ~93% DCI-P3.