The brightness function

The brightness function allows you to change a brightness of a background image. The initial brightness of the background is determined by the 100% value or 1; as they decrease, the image brightness also decreases. Accordingly, when the value increases more than 100%, the brightness increases. Negative values ​​are not applied, and an empty value is automatically treated as 1.

Syntax

cssselector {
  filter: brightness(number);
}

Example

Let's set the brightness of our image to 20%:

html<div id="elem"></div>

css#elem {
  filter: brightness(20%);
  background: url("bg.png") center / cover no-repeat;
  width: 400px;
  height: 300px;
  border: 1px solid black;
}

Результат:

Example

Now let's increase the brightness of the image to 120%:

html<div id="elem"></div>

css#elem {
  filter: brightness(120%);
  background: url("bg.png") center / cover no-repeat;
  width: 400px;
  height: 300px;
  border: 1px solid black;
}

Результат:

Example

Let's set our image to its original brightness:

html<div id="elem"></div>

css#elem {
  filter: brightness(1);
  background: url("bg.png") center / cover no-repeat;
  width: 400px;
  height: 300px;
  border: 1px solid black;
}

Результат:

See also