chromium/third_party/blink/web_tests/fast/css/bogus-color-span.html

<style>
    span { color: #bogus; }
    #normal { background-color: green; width: 100px; height: 100px; }
    #2bogus { background-color: green; width: 100px; height: 100px; }
    #222 { background-color: green; width: 100px; height: 100px; }
</style>
<div id="normal"></div>
<div id="2bogus"></div>
<div id="222"></div>