Placeholder Shown

HTML

<div>
  <input id="my_input" placeholder="placeholder" type="text">
  <label for="my_input">My Label</label>
</div>

JavaScript

$("#my_input").on("keydown keypress keyup paste", function () {
    var textColor = $(this).val() ? "red" : "green";
    $("div label").css({"color" : textColor});
});