blur()
Summary
Blurs an element, for use by the filter property. Accepts a distance measurement within which pixels are randomly scattered. A value of 0 leaves the image as is.
This CSS property value is reflected in the following image:
filter: blur(10px);
Note that pixels blur around the contours of image transparencies, possibly affecting the ability of background content to show through:
Examples
The following example shows the difference between two images, where one has a blur of 10px: 
<!DOCTYPE html>
<html>
<head>
<title>Blur example</title>
<style>
.foo {
float: left;
}
.bar {
-webkit-filter: blur(10px);
}
</style>
</head>
<body>
<img src="/logo/wplogo_transparent_xlg.png" class="foo" />
<img src="/logo/wplogo_transparent_xlg.png" class="foo bar" />
</body>
</html>
Notes
The CSS filter corresponds to this SVG filter definition, based on a variable radius passed to the function:
<filter id="blur">
<feGaussianBlur stdDeviation="[radius radius]">
</filter>
Related specifications
- Filter Effects 1.0
- Editor’s Draft
- Filter Effects 1.0
- Working Draft
See also
Related articles
Filters
blur()