css color

negative margin

negative margin

negative margin

negative margin

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<!DOCTYPR html> <html lang="en"> <head> <meta charset="UTF-8"> <title>BootStrap</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-9ndCyUaIbzAi2FUVXJi0CjmCapSmO7SnpJef0486qhLnuZ2cdeRhO02iuK6FUUVM" crossorigin="anonymous"> <link rel="stylesheet" href="stysle.css"> <style> .container{ border:1px solid black; } .row{ border:1px solid red; } </style> </head> <body> <!-- background colours --> <!-- bg-primary --> <!-- bg-secondary --> <!-- bg-success --> <!-- bg-warning --> <!-- bg-danger --> <!-- bg-info --> <!-- bg-white --> <div class="container"> <div class="row"> <div class="col-md-12 bg-danger" ><h1 >css color </h1></div> </div> <div class="row"> <div class="col-md-3 bg-secondary text-white" ><h4>negative margin </h4></div> <div class="col-md-3 bg-success text-danger" ><h4>negative margin </h4></div> <div class="col-md-3 bg-warning text-info" ><h4>negative margin </h4></div> <div class="col-md-3 bg-primary text-secondary" ><h4>negative margin </h4></div> </div> </div> </body> </html>