Color Contrast Is Not Enough

Meeting WCAG color contrast ratios is one of the first accessibility checks teams implement. It is also one of the most commonly misunderstood. Passing the ratio does not mean your color choices are accessible — it means they meet a minimum mathematical threshold.

Color perception varies wildly across users, devices, and contexts. A color combination that passes the 4.5:1 ratio on a calibrated monitor may fail on a budget laptop in bright sunlight. Users with cataracts, color vision deficiencies, or simply aging eyes need more than the minimum.

Beyond contrast, consider: are you using color alone to convey meaning? Is your error state only indicated by a red border? Is your success message only green text? Always pair color with icons, text, or other visual indicators that work regardless of color perception.