CIE Laboratory

Color Science and Accessibility Analysis Tool

Explore contrast accessibility, perceptual color models, and color vision simulation in an interactive color science laboratory.

Enter HEX colors (e.g., #0a0a0a or #fff). Use the slider to lighten/darken either color.

Pass thresholds: Normal AA ≥ 4.5, AAA ≥ 7.0.

Large (≥18pt/24px or 14pt/18.66px bold) AA ≥ 3.0, AAA ≥ 4.5.