chromium/third_party/blink/web_tests/external/wpt/css/css-color/opacity-overlapping-letters-ref.html

<link rel="stylesheet" href="/fonts/ahem.css">
<meta name="flags" content="ahem">
<div style="opacity: 0.5; letter-spacing: -0.6em; font: 100px/1 Ahem; white-space: pre">X X X</div>