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Add a blue background color to an element to set key stuff with Bootstrap
To set key stuff on an element, use the .bg-primary class in Bootstrap.
You can try to run the following code to implement .bg-primary class that is blue in color −
Example
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</title> <link rel = "stylesheet" href = "https://maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css"> <script src = "https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <script src = "https://maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> </head> <body> <h2>Example</h2> <div class = "container"> <div class = "w-50 bg-danger">Danger</div> <div class = "bg-primary">Key text!</div> </div> </body> </html>
Updated on: 2026-03-11T22:50:42+05:30
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