chromium/third_party/blink/web_tests/dark-mode/colors/border.html

<!doctype html>
<!-- crbug.com/1263545: light contrast input border should still be visible -->
<div style="width: 150px; background: #fff; border: 1px solid #dfe1e5;">light contrast border</div>
<br>

<!-- crbug.com/1263545: buttons with a visible border should still have a visible border -->
<div style="width: 150px; background: #f8f9fa; border: 1px solid #dadce0;">light contrast border 2</div>
<br>

<!-- crbug.com/1263545: buttons with no contrast border should still have no visible border -->
<!-- TODO(penglin) -->
<div style="width: 150px; background: #f8f9fa; border: 1px solid #f8f9fa;">no contrast border</div>
<br>

<!-- crbug.com/1057723: tables with contrasting borders should still have contrasting borders -->
<table>
    <tr>
        <td style="border: 1px solid black; background: white;">a</td>
        <td style="border: 1px solid black; background: white;">b</td>
    </tr>
</table>
<br>
<table style="border-collapse: collapse;">
    <tr>
        <td style="border: 1px solid black; background: white;">c</td>
        <td style="border: 1px solid black; background: white;">d</td>
    </tr>
</table>
<br>

<!-- crbug.com/1271977: svg with contrasting strokes should still have contrasting strokes -->
<!-- TODO(penglin) -->
<svg width="50" height="50">
    <rect x="5" y="5" width="40" height="40" fill="white" stroke="black" stroke-width="1"></rect>
</svg>
<br>

<!-- crbug.com/992137: heavy contrast input border should still be visible -->
<div style="width: 150px; background: #fff; border: 1px solid black;">heavy contrast border</div>
<br>

<!-- crbug.com/992137: borders with transparent backgrounds and contrasting borders should still have contrasting borders -->
<div style="background: white;">
    <div style="width: 150px; background: transparent; border: 1px solid black;">border</div>
</div>