Set a blue border to an element in Bootstrap

BootstrapWeb DevelopmentCSS Framework

Use the border-primary class to set a blue border to an element.

For a blue border, add the class, as if you add it for <div> or any other element −

<div class="demo border border-primary">

Let us see an example to set a blue border −


Live Demo

<!DOCTYPE html>
<html lang="en">
    <title>Bootstrap Example</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="">
    <script src=""></script>
    <script src=""></script>
    .demo {
      width: 350px;
      height: 170px;
      margin: 10px;
    <div class="container">
      <h2>Demo Heading</h2>
      <div class="demo border border-primary">This rectangle has blue border</div>
Published on 15-Jul-2018 16:25:49