This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The light-level CSS @media media feature can be used to apply styles based on the ambient light level.


The device is used in a dim environment, where excessive contrast and brightness would be distracting or uncomfortable to the reader. For example: night time, or a dimly illuminated indoor environment.
The device is used in a environment with a light level in the ideal range for the screen, and which does not necessitate any particular adjustment.
The device is used in an exceptionally bright environment, causing the screen to be washed out and difficult to read. For example: bright daylight.


This code will likely not work on any devices (device compatablility is low).

@media (light-level: normal) {
  p {
    background: url("texture.jpg");
    color: #333;

@media (light-level: dim) {
  p {
    background: #222;
    color: #ccc;

@media (light-level: washed) {
  p {
    background: white;
    color: black;
    font-size: 2em;


Specification Status Comment
Media Queries Level 4
The definition of 'light-level' in that specification.
Candidate Recommendation Deferred to Media Queries Level 5.

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support No support No support No support No support No support
Feature Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support No support No support No support No support No support

Document Tags and Contributors

Contributors to this page: mfluehr, carlosvigil, CKH4, Sebastianz, kscarfone, cvrebert
Last updated by: mfluehr,