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The CSS contrast() Filter Function

This article demonstrates how to the use the CSS contrast filter function on elements with CSS filter. Included is code and examples.

The CSS contrast function is a value of CSS filter property. Contrast adjusts the contrast of the target HTML element. This can also include an image.

Syntax

filter: contrast(value);

Parameters

  • value (required)

The value parameter of contrast is a number or percentage. A value over 100% increases contrast, while under 100% the contrast is decreased. The default value of contrast is 100%, which will leave an element unchanged. The default value is 1 when left unfilled. The initial interpolation value is 1.

Examples

The examples below use numbers and percentages values for the parameter of the contrast filter function.

contrast(1)     /* No effect */
contrast(27%)   /* A contrast of 27% */
contrast(35%)   /* A contrast of 35% */
contrast(0.6)   /* A contrast of 0.6 or 60% */
contrast(102%)  /* A contrast of 17% */
contrast(1.7)   /* A contrast of 1.7 or 170% */

Usage

You can apply the contrast filter to an image or any other element by using CSS selectors.

#element-id {
  filter: contrast(120%);
}

img {
  filter: contrast(0.75);
}

Try It

The CSS Contrast Filter Function
The CSS Contrast Filter Function

HTML

<div class="wrapper">
  <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/46992/noah-silliman-141979.jpg" alt="" />
  <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/46992/noah-silliman-141979.jpg" alt="" />
  <img src="https://s3-us-west-2.amazonaws.com/s.cdpn.io/46992/noah-silliman-141979.jpg" alt="" />
</div>

CSS

.wrapper img {
  width: 300px;
  height: 300px;
  object-fit: cover;
  border-radius: 6px;
  margin: 0 20px;
  vertical-align: middle;
}

.wrapper img:nth-child(1) {
  filter: contrast(50%);
}

.wrapper img:nth-child(2) {
  filter: contrast(100%);
}

.wrapper img:nth-child(3) {
  filter: contrast(150%);
}

html {
  text-align: center;
  min-height: 100%;
  background: linear-gradient(white, #ddd);
}

.wrapper {
  width: 100%;
  background: transparent;
  text-align: center;
  -webkit-box-align: center !important;
  -ms-flex-align: center !important;
  align-items: center !important;
  -webkit-box-pack: center !important;
  -ms-flex-pack: center !important;
  justify-content: center !important;
  display: -webkit-box !important;
  display: -ms-flexbox !important;
  display: flex !important;
  height: 100%;
}

html,
body {
  height: 100%;
  margin: 0;
}

Specifications

W3C CSS Filter Effects Module Level 1
#funcdef-filter-contrast

Other Filter Functions