<pre class="brush: css notranslate"><code><span class="token comment">/ Keyword value /</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> none<span class="token punctuation">;</span> <span class="token comment">/ URL to SVG filter /</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token url"><span class="token function">url</span><span class="token punctuation">(</span>commonfilters.svg#filter<span class="token punctuation">)</span></span><span class="token punctuation">;</span> <span class="token comment">/ &lt;filter-function&gt; values /</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">blur</span><span class="token punctuation">(</span>2px<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">brightness</span><span class="token punctuation">(</span>60%<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">contrast</span><span class="token punctuation">(</span>40%<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">drop-shadow</span><span class="token punctuation">(</span>4px 4px 10px blue<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">grayscale</span><span class="token punctuation">(</span>30%<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">hue-rotate</span><span class="token punctuation">(</span>120deg<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">invert</span><span class="token punctuation">(</span>70%<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">opacity</span><span class="token punctuation">(</span>20%<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">sepia</span><span class="token punctuation">(</span>90%<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token function">saturate</span><span class="token punctuation">(</span>80%<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">/ Multiple filters /</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> <span class="token url"><span class="token function">url</span><span class="token punctuation">(</span>filters.svg#filter<span class="token punctuation">)</span></span> <span class="token function">blur</span><span class="token punctuation">(</span>4px<span class="token punctuation">)</span> <span class="token function">saturate</span><span class="token punctuation">(</span>150%<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment">/ Global values /</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> inherit<span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> initial<span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> revert<span class="token punctuation">;</span> <span class="token property">backdrop-filter</span><span class="token punctuation">:</span> unset<span class="token punctuation">;</span> </code></pre>

backdrop-filter

The backdrop-filter CSS property lets you apply graphical effects such as blurring or color shifting to the area behind an element. Because it applies to everything behind the element, to see the effect you must make the element or its background at least partially transparent.

/* Keyword value */ backdrop-filter: none;  /* URL to SVG filter */ backdrop-filter: url(commonfilters.svg#filter);  /* <filter-function> values */ backdrop-filter: blur(2px); backdrop-filter: brightness(60%); backdrop-filter: contrast(40%); backdrop-filter: drop-shadow(4px 4px 10px blue); backdrop-filter: grayscale(30%); backdrop-filter: hue-rotate(120deg); backdrop-filter: invert(70%); backdrop-filter: opacity(20%); backdrop-filter: sepia(90%); backdrop-filter: saturate(80%);  /* Multiple filters */ backdrop-filter: url(filters.svg#filter) blur(4px) saturate(150%);  /* Global values */ backdrop-filter: inherit; backdrop-filter: initial; backdrop-filter: revert; backdrop-filter: unset; 

Syntax

Values

No filter is applied to the backdrop.

A space-separated list of <filter-function>s or an SVG filter that will be applied to the backdrop.

Formal definition

Formal syntax

none | <filter-function-list>
where <filter-function-list> = [ <filter-function> | <url> ]+
where <filter-function> = <blur()> | <brightness()> | <contrast()> | <drop-shadow()> | <grayscale()> | <hue-rotate()> | <invert()> | <opacity()> | <saturate()> | <sepia()>
where <blur()> = blur( <length> )<brightness()> = brightness( <number-percentage> )<contrast()> = contrast( [ <number-percentage> ] )<drop-shadow()> = drop-shadow( <length>{2,3} <color>? )<grayscale()> = grayscale( <number-percentage> )<hue-rotate()> = hue-rotate( <angle> )<invert()> = invert( <number-percentage> )<opacity()> = opacity( [ <number-percentage> ] )<saturate()> = saturate( <number-percentage> )<sepia()> = sepia( <number-percentage> )
where <number-percentage> = <number> | <percentage><color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hwb()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>
where <rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]? ) | rgb( <number>{3} [ / <alpha-value> ]? ) | rgb( <percentage>#{3} , <alpha-value>? ) | rgb( <number>#{3} , <alpha-value>? )<rgba()> = rgba( <percentage>{3} [ / <alpha-value> ]? ) | rgba( <number>{3} [ / <alpha-value> ]? ) | rgba( <percentage>#{3} , <alpha-value>? ) | rgba( <number>#{3} , <alpha-value>? )<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsl( <hue>, <percentage>, <percentage>, <alpha-value>? )<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsla( <hue>, <percentage>, <percentage>, <alpha-value>? )<hwb()> = hwb( [<hue> | none] [<percentage> | none] [<percentage> | none] [ / [<alpha-value> | none] ]? )
where <alpha-value> = <number> | <percentage><hue> = <number> | <angle>

Examples

CSS

.box {   background-color: rgba(255, 255, 255, 0.3);   border-radius: 5px;   font-family: sans-serif;   text-align: center;   line-height: 1;  -webkit-backdrop-filter: blur(10px);   backdrop-filter: blur(10px);   max-width: 50%;   max-height: 50%;   padding: 20px 40px; }  html, body {   height: 100%;   width: 100%; }  body {   background-image: url(https://picsum.photos/id/1080/6858/4574), linear-gradient(rgb(219, 166, 166), rgb(0, 0, 172));   background-position: center center;   background-repeat: no-repeat;   background-size: cover; }  .container {   align-items: center;   display: flex;   justify-content: center;   height: 100%;   width: 100%; } 

HTML

<div class="container">   <div class="box">     <p>backdrop-filter: blur(10px)</p>   </div> </div> 

Result

Specifications

See also

Last modified: Aug 12, 2021, by MDN contributors