Introducing Adaptive Dark Mode

Apple introduced Adaptive Dark Mode in the Safari 27.3 beta, a WebKit feature that automatically converts light-themed websites into dark versions when a user’s system appearance is set to dark. The company said nearly 40% of web page loads come from users in dark mode, while only about 10% of page loads support it, leaving a substantial gap the feature is designed to close. Adaptive Dark Mode uses a color matrix to invert luminosity while preserving hue, aims for WCAG 4.5:1 text contrast, and selectively transforms SVG icons and simple black-and-white bitmap logos while leaving most images and canvas content unchanged. Sites that declare dark-mode support via HTML or CSS color-scheme signals are left untouched. The feature’s rollout will be watched as a test of whether browser-level rendering can compensate for slow publisher adoption of native dark themes.