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chromium/third_party/blink/web_tests/fast/forms/text/input-appearance-default-bkcolor.html 

<html>
<body style="background-color: purple;">
This tests that the default background color for the new text fields is white.
<br><input style=" -khtml-appearance: textfield;" type="text" value="This should be white.">
</body>
</html>