<style>
input.red::placeholder {
    color: rgb(100, 0, 0);
}
</style>
This tests that you can set the placeholder text color.<br>
<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">