Individuals now have the opportunity to assess their own color perception capabilities through the newly launched website ‘Your ΔE(OK) JND?’ created by software developer Keith Cirkel. This platform allows users to evaluate their ability to distinguish between colors, generating scores based on the Delta-E (ΔE) of their Just Noticeable Difference (JND) in the Oklab color space, which is accessible in modern browsers.
The test comprises approximately 40 rounds, where participants click or tap a line between two colors displayed on the screen. While most users typically achieve a score of around 0.02, results can vary significantly depending on the quality of the display being used. For instance, devices with lower-end panels or poor calibration may yield less accurate scores. Users can share their final scores via a personalized URL.
Cirkel's motivation for developing this website stemmed from his work on a CSS color minifier, which necessary precision for color values prompted his exploration of color differences. He emphasized that achieving more than three decimal places in color values is often unnecessary. His blog also delves into the science of Delta-E and color mapping across various color spaces.