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Blur

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Blur refers to a visual effect that softens the appearance of an element by creating a gradient transition between its edges and the background or between different parts of the element itself. It’s commonly used to reduce visual clutter, focus attention on a specific area, or create a sense of depth and hierarchy.

In user interfaces, blur effects can enhance readability by muting background content behind modal windows, notifications, or important actionable items, thereby drawing the user’s focus to the foreground elements. Additionally, blur can add a stylistic, atmospheric quality to designs, contributing to a more refined and polished user experience.

Guidelines

Correct / Incorrect

Correct

An image showing a text, on top of a blurred white semi-transparent layer with an image as a background.

Use blur effects focus attention on key elements and enhance readability.

Incorrect

An image showing a text, on top of a white semi-transparent layer with an image as a background.

Not using blur effects can make the background too distracting and reduce the readability of the text.

Takeaways

  • Blur effects shouldn’t be used to mask poor design decisions or low-quality images.

Usage

Implementation

Properties

Blur

Type : CSS Class

demo
default
Blur:
0px
Opacity:
0
demo
Blur:
7px
Opacity:
0.4
demo
Blur:
10px
Opacity:
0.7
demo
Blur:
20px
Opacity:
0.9