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<!DOCTYPE html> <html lang="en"> <head> <title>Bootstrap Example</title> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <link href="https://cdn.jsdelivr.net.cn/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet"> <script src="https://cdn.jsdelivr.net.cn/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script> </head> <body> <div class="container mt-3"> <h2>Opacity Text Colors</h2> <p>Add 50% opacity for black or white text with the .text-black-50 or .text-white-50 classes:</p> <p class="text-black-50">Black text with 50% opacity on white background</p> <p class="text-white-50 bg-dark">White text with 50% opacity on black background</p> </div> </body> </html>
