prefers-contrast

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The prefers-contrast CSS media feature is used to detect if the user has requested that the web content is presented with a higher (or lower) contrast.

Syntax

no-preference: Indicates that the user has made no preference known to the system. This keyword value evaluates as false in a Boolean context.
more: Indicates that user has notified the system that they prefer an interface that has a higher level of contrast.
less: Indicates that user has notified the system that they prefer an interface that has a lower level of contrast.

User preferences

Various operating systems do support such preferences and user agents are likely to rely on the settings provided by the operating system.

Examples

This example has an annoying low contrast by default.

HTML

<div class="contrast">low contrast box</div>

CSS

.contrast {
  width: 100px;
  height: 100px;
  outline: 2px dashed black;
}

@media (prefers-contrast: more) {
  .contrast {
    outline: 2px solid black;
  }
}

Result

Specifications

Specification
Media Queries Level 5 # prefers-contrast

Browser compatibility

BCD tables only load in the browser