How I can change alert message text color using JavaScript?

You can try to run the following code to change the alert message text color. To change the text color of the alert message, use the following custom alert box. We’re using JavaScript library, jQuery to achieve this and will change the alert message text color to “#FCD116” −


Live Demo

<!DOCTYPE html>
      <script src="">
         function functionAlert(msg, myYes) {
            var confirmBox = $("#confirm");
            confirmBox.find(".yes").unbind().click(function() {
      #confirm {
         display: none;
         background-color: #514E61;
         color: #FCD116;
         border: 1px solid #aaa;
         position: fixed;
         width: 250px;
         left: 50%;
         margin-left: -100px;
         padding: 6px 8px 8px;
         box-sizing: border-box;
         text-align: center;
      #confirm button {
         background-color: #48E5DA;
         display: inline-block;
         border-radius: 5px;
         border: 1px solid #aaa;
         padding: 5px;
         text-align: center;
         width: 80px;
         cursor: pointer;
      #confirm .message {
         text-align: left;
      <div id="confirm">
         <div class="message">This is a warning message.</div>
         <button class="yes">OK</button>
      <input type="button" value="Click Me" onclick="functionAlert();" />