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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>Hover Effects</h2> <p>You can also combine w3-hover-color classes with w3-hover-opacity to create a slightly "lighter" background-color.</p> <div class="w3-panel w3-border w3-hover-red w3-padding"> <p>w3-hover-red</p> </div> <div class="w3-panel w3-border w3-hover-opacity w3-hover-red w3-padding"> <p>w3-hover-red with w3-hover-opacity</p> </div></div></body></html>