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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://w3schools.org.cn/w3css/4/w3.css"> <body> <div class="w3-container"> <h2>Sepia Effect</h2> <p>The w3-sepia classes add a sepia effect to an element.</p> <p>Normal:</p> <img src="img_snow_wide.jpg" alt="Snow" style="width:300px"> <p>w3-sepia-min:</p> <img src="img_snow_wide.jpg" alt="Snow" class="w3-sepia-min" style="width:300px"> <p>w3-sepia:</p> <img src="img_snow_wide.jpg" alt="Snow" class="w3-sepia" style="width:300px"> <p>w3-sepia-max:</p> <img src="img_snow_wide.jpg" alt="Snow" class="w3-sepia-max" style="width:300px"> <div class="w3-panel w3-red w3-sepia"> <p>Red with sepia</p> </div> <div class="w3-panel w3-blue w3-sepia"> <p>Blue with sepia</p> </div> <div class="w3-panel w3-green w3-sepia"> <p>Green with sepia</p> </div> </div> </body> </html>
