chromium/third_party/blink/web_tests/virtual/forced-high-contrast-colors/fast/css/forced-colors-mode/forced-colors-mode-copy-paste-02.html

<!DOCTYPE html>
<html>
<style>
#target {
  background-color: blue;
  color: red;
}
#destination {
  background-color: green;
  /* this is needed to simulate pasting forced colors into a non-forced colors element */
  forced-color-adjust: none;
}
</style>
<div id="parent">
  <div id="target">Copy this line</div>
  <div id="other">and this line</div>
</div>

Paste here:
<div id="destination" contenteditable></div>
<script>
document.body.focus();
var other = document.getElementById('other');
getSelection().collapse(other, 1);
getSelection().extend(target, 0);

document.execCommand('Copy', false, null);
document.getElementById('destination').focus();
document.execCommand('Paste', false, null);
// Remove focus to remove caret from test result image
document.getElementById('destination').blur();
</script>
</html>