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<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://www.w3schools.com/w3css/5/w3.css"><body><div class="w3-container"> <h2>Thick Border Bars</h2> <div class="w3-panel w3-light-grey w3-leftbar"> <p>I have a thick left border.</p> </div> <div class="w3-panel w3-light-grey w3-leftbar w3-border-grey"> <p>I have a thick left border.</p> </div> <div class="w3-panel w3-leftbar w3-border-blue"> <p>I have a thick blue left border.</p> </div> <div class="w3-panel w3-leftbar w3-border-blue w3-text-blue"> <p>I have a thick blue left border.</p> </div> <div class="w3-panel w3-leftbar w3-border-red"> <p>I have a thick red left border.</p> </div> <div class="w3-panel w3-leftbar w3-border-red w3-text-red"> <p>I have a thick red left border.</p> </div> <div class="w3-panel w3-leftbar w3-border-blue w3-pale-blue"> <p>I have a thick blue left border and a pale-blue background color.</p> </div> <div class="w3-panel w3-topbar w3-bottombar w3-border-red w3-pale-red"> <p>I have a thick red top and bottom border and a pale-red background color.</p> </div> <div class="w3-panel w3-leftbar w3-border-green"> <p>I have a thick green left border.</p> </div>