Safari introduces Adaptive Dark Mode in 27.3

Apple's Safari 27.3 beta introduces an 'Adaptive Dark Mode' feature that automatically converts light-themed websites into dark mode. The tool uses a color matrix to invert luminosity while preserving hue and maintaining WCAG contrast standards for accessibility.
Why it matters
This feature improves user experience and accessibility for web browsing by providing a consistent dark interface, even on websites that do not natively support it.
by Simon Fraser, Luming Yin, Lily Spiniolas, Joanne Pan and Jen Simmons
We’re excited to announce Adaptive Dark Mode in Safari 27.3 beta. When enabled by a user, Safari adapts light websites and presents them as dark.
In the spring of 2019, Safari 12.1 became the first browser to support dark mode on the web. A lot of people love using dark mode, but not every website has a dark version. Almost 40% of web page loads are from users in dark mode, and yet only 10% of page loads support it. If you love dark mode, you’ve probably hit a site that felt particularly bright . Adaptive Dark Mode is designed to close that gap, providing a consistent dark experience across the web.
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