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CSS | opacity() Function

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  • Last Updated : 19 Aug, 2022
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The opacity() function is an inbuilt function which is used to apply a filter to the image to set the transparency of the image. 

Syntax:

opacity( amount )

Parameters: This function accepts single parameter amount which holds the amount of transparency. The value of opacity is set in terms of number and percentage. The value 0% represents the complete transparent image and 100% represents the original image. 

Below example illustrates the opacity() function in CSS: 

Example: 

html




<!DOCTYPE html>
<html>
 
<head>
    <title>CSS opacity() Function</title>
     
    <style>
        h1 {
            color:green;
        }
        body {
            text-align:center;
        }
        .opacity_effect {
            filter: opacity(30%);
        }
    </style>
</head>
 
<body>
    <h1>GeeksforGeeks</h1>
     
    <h2>CSS opacity() function</h2>
     
    <img class="opacity_effect" src=
        alt="GeeksforGeeks logo">
</body>
 
</html>

Output:

  

Supported Browsers: The browsers supported by opacity() function are listed below:

  • Google Chrome 18 and above
  • Edge 12 and above
  • Internet Explorer not supported
  • Firefox 35 and above
  • Safari 6 and above
  • Opera 15 and above
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