The forced-color-adjust property, which controls whether user agent system theme colors overrides should be applied to an element and its descendants.At time of writing, this is essentially a match for the high contrast feature on Windows, but there could potentially be other similar forced color modes in other operating systems in the future. The forced-colors media query, for detecting an active forced color mode.There are three key features authors can use to leverage the new standards for forced colors: Web developers can then style on top of these defaults as needed using the new standards for forced colors. For example, browsers can apply high contrast theme colors semantically to HTML elements and adjust certain CSS properties to reduce visual noise. Whatever the reason, applications can integrate with the user’s system colors and apply the user theme to their UI. There are many reasons why a particular individual might enable high contrast on Windows: to better see elements on the screen to reduce visual noise so they can focus better to ease eye strain, migraines, or light sensitivity or simply because they prefer a very particular color scheme. The name “high contrast” is actually a misnomer-users can set their theme colors to whatever they prefer, including themes that result in lower than common contrast levels. This scheme can then be applied to user interfaces and app content, reducing visual complexity while guaranteeing the user’s preferred contrast level. The feature works by enabling the user to select theme colors for a scoped number of semantic elements.
High contrast on Windows is an accessibility feature designed to increase text legibility and improve readability.
Now that a few final discussions in the CSS Working Group are reaching their resolution, and other browsers prepare to ship support, we’d like to share how you can use the new standards-and what differences you can expect from legacy implementations.īut first, what is high contrast? Windows High Contrast Microsoft Edge shipped these standards from our first Stable release in version 79. Thanks to collaboration with our partners in the CSS Working Group and the Chromium project, web developers can now use new web standards to style their content for forced color modes like Windows high contrast. We also recognized a fantastic opportunity-it was time to finally standardize high contrast styling features.ĬSS features for Windows high contrast have been available in Microsoft browsers for quite some time, but were -ms-prefixed and unsupported in other browsers. As Microsoft Edge prepared to re-platform on top of Chromium open source, we recognized our responsibility to continue supporting those who depend on Windows high contrast for web content.
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