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chromium/third_party/blink/web_tests/paint/invalidation/outline/outline-current-color.html 

<!DOCTYPE html>
<style>
div {
  margin: 50px;
  outline-width: 10px;
  outline-style: solid;
  width: 100px;
  height: 100px;
}
</style>
<div id="fixedColor" style="outline-color: blue"></div>
<div id="currentColor" style="outline-color: currentColor"></div>
<script src="../resources/text-based-repaint.js"></script>
<script>
function repaintTest() {
  fixedColor.style.color = 'green';
  currentColor.style.color = 'green';
}
onload = runRepaintAndPixelTest;
</script>