bootstrap tutorial - How to change Bootstrap default input focus glow style - bootstrap examples - bootstrap templates - bootstrap 3
Answer: Use the CSS box-shadow Property
By default, all the textual <input> elements, <textarea>, and <select> elements with the class .form-control highlighted in blue glow upon receiving the focus in Bootstrap. However, you can modify this default focus glow or shadow styles by simply setting the CSS border-color and box-shadow property, like this:
Example
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Override Bootstrap Input Focus Styles - Wikitechy</title>
<link rel="stylesheet" href="css/bootstrap.min.css">
<link rel="stylesheet" href="css/bootstrap-theme.min.css">
<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
<script src="js/bootstrap.min.js"></script>
<style type="text/css">
.form-control:focus {
border-color: #ff80ff;
box-shadow: 0px 1px 1px rgba(0, 0, 0, 0.075) inset, 0px 0px 8px rgba(255, 100, 255, 0.5);
}
</style>
</head>
<body>
<form>
<div class="form-group">
<label>Name</label>
<input type="text" class="form-control" placeholder="Full Name">
</div>
<div class="form-group">
<label>Address</label>
<textarea class="form-control" rows="4" placeholder="Mailing Address"></textarea>
</div>
<div class="form-group">
<label>Country</label>
<select class="form-control">
<option>Select</option>
<option>India</option>
<option>USA</option>
<option>UK</option>
</select>
</div>
<div class="checkbox">
<label><input type="checkbox"> Agree with Terms and Conditions</label>
</div>
<button type="submit" class="btn btn-primary">Send</button>
</form>
</body>
</html>