Accessibility / Color / Forced Colors Preview Bookmarklet

The Forced Colors Preview bookmarklet approximates the Windows high contrast mode / forced colors appearance. Applies CSS that overrides backgrounds to transparent/black, sets text to white, makes links cyan with underlines, gives form controls white borders on black backgrounds, and applies grayscale + contrast filters to images and videos. Useful for testing whether pages remain usable when users' color preferences override the site's design. Run again to remove.

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