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<!DOCTYPE html> <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 class="w3-container"> <h2>Hover Effect</h2> <p>You can also add special effects on hover/mouse-over.</p> <h3>w3-hover-opacity:</h3> <img src="img_snowtops.jpg" class="w3-image w3-hover-opacity" style="width:300px"> <h3>w3-hover-grayscale:</h3> <img src="img_snowtops.jpg" class="w3-image w3-hover-grayscale" style="width:300px"> <h3>w3-hover-sepia:</h3> <img src="img_snowtops.jpg" class="w3-image w3-hover-sepia" style="width:300px"> </body> </html>
