color-adjust

The color-adjust CSS property gives the web author control over what if anything the user agent may do to optimize the appearance of the element on the output device. By default, the browser is allowed to make any adjustments to the element's appearance it determines to be necessary and prudent given the type and capabilities of the output device.

In the example above, the text color, #411, is so dark that it's difficult to read given the black background-color. Depending on the browser, its configuration, and the device on which the example is being viewed, the browser may opt to remove the black background or change the text color in order to improve contrast and make the text more legible.

Syntax

color-adjust: economy;
color-adjust: exact

The color-adjust property's value must be one of the following keywords.

Values

economy
The user agent is allowed to make adjustments to the element as it deems appropriate and prudent in order to optimize the output for the device it's being rendered for. For example, when printing, a browser might opt to leave out all background images and to adjust text colors to be sure the contrast is optimized for reading on white paper. This is the default.
exact
The element's content has been specifically and carefully crafted to use colors, images, and styles in a thoughtful and/or important way, such that being altered by the browser might actually make things worse rather than better. The appearance of the content should not be changed except by the user's request. For example, a page might include a list of information with rows whose background colors alternate between white and a light grey. Removing the background color would decrease the legibility of the content.

Formal syntax

economy | exact

Usage notes

There are a number of reasons a browser might wish to deviate from the specified appearance, such as:

  • The content uses text and background colors that will be too similar on the output device for legibility purposes.
  • If the output device is a printer, and to save ink, dark or extremely dense background images might be removed.
  • When printing a page, the browser might want to replace light-colored text on a dark background with dark text on a white background.

Any options the user agent offers the user to allow them to control the use of color and images will take priority over the value of color-adjust. In other words, there isn't any guarantee that color-adjust will do anything. Not only can the user override the behavior, but each user agent is allowed to decide for itself how to handle color-adjust in any given situation.

Examples

In this example, a box is shown which uses a background-image and a translucent linear-gradient() function atop a black background color to have a dark blue gradient behind medium red text. For whatever reason, this is the desired appearance in any rendering environment, including on paper, so we also use color-adjust: exact to tell the browser not to make color or style adjustments to the box when rendering it.

CSS

.my-box {
  background-color: black;
  background-image: linear-gradient(rgba(0, 0, 180, 0.5), rgba(70, 140, 220, 0.5));
  color: #900;
  width: 15rem;
  height: 6rem;
  text-align: center;
  font: 24px "Helvetica", sans-serif;
  display: flex;
  align-items: center;
  justify-content: center;
  color-adjust: exact;
}

HTML

<div class="my-box">
  <p>Need more contrast!</p>
</div>

Result

Specifications

Specification Status Comment
CSS Color Module Level 4
The definition of 'color-adjust' in that specification.
Working Draft Initial definition.
Initial valueeconomy
Applies toall elements
Inheritedyes
Mediavisual
Computed valueas specified
Animation typediscrete
Canonical orderper grammar

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support49 -webkit- No48 No15 -webkit- 6 -webkit-
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? ? No48 ? ? ?

See also

Document Tags and Contributors

Contributors to this page: XPiRED, wbamberg, Siilwyn, Sheppy
Last updated by: XPiRED,