backdrop-filter: blur()

Utilities for applying backdrop blur filters to an element.

Source: https://tailwindcss.com/guide/backdrop-filter-blur

Quick reference

Class	Styles
backdrop-blur-none	backdrop-filter: ;
backdrop-blur-xs	backdrop-filter: blur(var(--blur-xs));
backdrop-blur-sm	backdrop-filter: blur(var(--blur-sm));
backdrop-blur-md	backdrop-filter: blur(var(--blur-md));
backdrop-blur-lg	backdrop-filter: blur(var(--blur-lg));
backdrop-blur-xl	backdrop-filter: blur(var(--blur-xl));
backdrop-blur-2xl	backdrop-filter: blur(var(--blur-2xl));
backdrop-blur-3xl	backdrop-filter: blur(var(--blur-3xl));
backdrop-blur-(<custom-property>)	backdrop-filter: blur(var(<custom-property>));
backdrop-blur-[<value>]	backdrop-filter: blur(<value>);

Examples

Basic example

Use utilities like backdrop-blur-sm and backdrop-blur-lg to blur an element's backdrop:

<div class="bg-[url(/img/mountains.jpg)]">
  <div class="bg-white/30 backdrop-blur-none ..."></div>
</div>
<div class="bg-[url(/img/mountains.jpg)]">
  <div class="bg-white/30 backdrop-blur-sm ..."></div>
</div>
<div class="bg-[url(/img/mountains.jpg)]">
  <div class="bg-white/30 backdrop-blur-md ..."></div>
</div>
<div class="bg-[url(/img/mountains.jpg)]">
  <div class="bg-white/30 backdrop-blur-lg ..."></div>
</div>

Using a custom value

Use the backdrop-blur-[<value>] syntax to set the backdrop blur based on a completely custom value:

<div class="backdrop-blur-[2px] ...">
  <!-- ... -->
</div>

For CSS variables, you can also use the backdrop-blur-(<custom-property>) syntax:

<div class="backdrop-blur-(--my-backdrop-blur) ...">
  <!-- ... -->
</div>

This is just a shorthand for backdrop-blur-[var(<custom-property>)] that adds the var() function for you automatically.

Responsive design

Prefix a backdrop-filter: blur() utility with a breakpoint variant like md: to only apply the utility at medium screen sizes and above:

<div class="backdrop-blur-none md:backdrop-blur-lg ...">
  <!-- ... -->
</div>

Learn more about using variants in the variants documentation.

Customizing your theme

Use the --blur-* theme variables to customize the backdrop blur utilities in your project:

@theme {
  --blur-2xs: 2px;
}

Now the backdrop-blur-2xs utility can be used in your markup:

<div class="backdrop-blur-2xs">
  <!-- ... -->
</div>

Learn more about customizing your theme in the theme documentation.