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chromium/third_party/blink/web_tests/external/wpt/forced-colors-mode/forced-colors-mode-31-ref.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>Forced colors mode - outline and column color with sys colors.</title>
<style>
  h1 {
    forced-color-adjust: none;
    outline-color: LinkText;
    outline-style: solid;
    column-count: 3;
    column-gap: 40px;
    column-rule-color: LinkText;
    column-rule-style: solid;
  }
</style>
<h1>
  The outline-color and column-rule-color should be LinkText when forced colors
  mode is enabled.
</h1>