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Background color translucent

2022-06-12 08:40:00 【Little boy who likes hot pot】

1. How to write it ：

background:rgba(0,0,0,0.3);

r:red  g:green  b:black

The last parameter is alpha transparency , The value range is 0—1 Range （0 For opacity ,1 For transparency ,0 To 1 The middle value of is translucent ）

2. Background translucency refers to the translucency of the box background , The contents of the box are not affected

Code ：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title> Background color transparent writing </title>

    <style>
          div{
               width:  300px;
               height: 300px;
               background: rgba(0,0,0,0.3);
          }
    </style>
</head>

<body>
        <div> Background color transparent writing </div>    
</body>

</html>

Running effect ：

 

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