This tests that you can set the placeholder text color.
<input class="red" placeholder="text">
<input class="red" type="search" placeholder="search">
<input class="red" type="password" placeholder="password">
<input class="red" disabled placeholder="disabled text">
<input placeholder="default">
<input placeholder="default" disabled>

HTML5 inputs and attribute support

<input> type autocomplete autofocus list maxlength pattern placeholder readonly required Disabled size
<input> type autocomplete autofocus list maxlength multiple pattern placeholder readonly required disabled size
<input> type autocomplete autofocus maxlength pattern placeholder readonly required disabled size
<input> type autocomplete autofocus list max min readonly required step
<input> type autocomplete autofocus list max min readonly required step
<input> type autocomplete autofocus list max min step
<input> type autocomplete autofocus list
<input> type autofocus checked required
<input> type accept autofocus multiple required