BootStrap

<!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"> <style> .container{ border:1px solid black; } .row{ border:1px solid red;} .col, .col-1, .col-2, .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-10, .col-11, .col-12 { border:1px solid blue;} .pink{ background:pink; } .green{ background:green; } .silver{ background:silver; } .lblue{ background:lightblue; } .Orange{ background:orange; } .Violet{ background:Violet; } .msgreen{ background:MediumSeaGreen; } </style></head> <body>  <div class="container"> <div class="row"> <div class="col-md-4" ><div class="lblue mx-lg-n5">negative margin </div></div> <div class="col-md-4" ><div class="green my-lg-n5">negative margin </div></div> <div class="col-md-4" ><div class="orange my-lg-n2">negative margin </div></div> </div> </div> </body> </html>