半透明颜色

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css" media="screen"> body { background:url(image/半透明颜色.jpeg); } div { width:600px; height: 600px; margin: 100px auto; background: rgba(0,0,0,0.3); } </style> </head> <body> <div> </div> </body> </html>

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