light-level

The light-level CSS media feature can be used to test the ambient light level.

Syntax

dim

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.

normal

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.

washed

The device is used in an exceptionally bright environment, causing the screen to be washed out and difficult to read. For example: bright daylight.

Examples

@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;
  }
}

Specifications

Browser compatibility