<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <input type="text" placeholder="aww" class="change"> <input type="text" placeholder="aww"> <input type="text" placeholder="aww"> <input type="text" placeholder="aww" class="change"> <input type="text" placeholder="aww">

.change::-webkit-input-placeholder { /* WebKit, Blink, Edge */ color: #909; } .change:-moz-placeholder { /* Mozilla Firefox 4 to 18 */ color: #909; opacity: 1; } .change::-moz-placeholder { /* Mozilla Firefox 19+ */ color: #909; opacity: 1; } .change:-ms-input-placeholder { /* Internet Explorer 10-11 */ color: #909; } input[type="text"]{ display:block; width:300px; padding:5px; margin-bottom:5px; font-size:1.5em; }