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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 Effect</h2> <p>You can also add special effects on hover/mouse-over.</p> <p><strong>Note:</strong> The w3-hover-sepia and w3-hover-grayscale classes are not supported in IE 11 and earlier versions.</p> <p>w3-hover-opacity:</p> <img src="img_workshop.jpg" class="w3-hover-opacity" style="width:150px"> <p>w3-hover-grayscale:</p> <img src="img_workshop.jpg" class="w3-hover-grayscale" style="width:150px"> <p>w3-hover-sepia:</p> <img src="img_workshop.jpg" class="w3-hover-sepia" style="width:150px"></div></body></html>