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CSS | invert() Function

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  • Last Updated : 19 Aug, 2022
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The invert() function is an inbuilt function that is used to apply a filter to the image to set the invert of the color of the sample image. 

Syntax:

invert( amount )

Parameters: This function accepts single parameter amount which holds the amount of conversion. The value of invert is set in terms of value and percentage. The value 0% represents original image and 100% represents the inverted image. The invert() function internally uses the following formula, to computer the inverse of the image:

amount * (255 - value) + (1 - amount) * value

The value of inversion is controlled by the variable amount, the variable value lies between 0 – 1(floating) range (this is done by converting the passed percentage of color inversion to a value between 0-1). The value is  the color value of the pixel. (255-value) gives the color after subtracting the color value with the max pixel value, assumes that the value of the pixel is in the range 0 – 255 (though input image sample space could be stretched/scaled to meet the specified criteria). Below is a table containing a list of inversion percentages and the result they produce.

InversionResult
0%Original Image
50%Image with each pixel having grey color
100%Completely inverted Image

Below example illustrates CSS invert() function in CSS: 

Example: 

html




<!DOCTYPE html>
<html>
 
<head>
    <title>CSS invert() Function</title>
     
    <style>
        h1 {
            color:green;
        }
        body {
            text-align:center;
        }
        .invert_effect {
            filter: invert(100%);
        }
    </style>
</head>
 
<body>
    <h1>GeeksforGeeks</h1>
     
    <h2>CSS invert() function</h2>
     
    <img class="invert_effect" src=
        alt="GeeksforGeeks logo">
</body>
 
</html>

Output:

  

Supported Browsers: The browsers supported by invert() 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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