opacity function

The opacity function allows you to change a transparency of the background image. The value of 100% or 1 leaves the image at its original transparency. The value of 0 means that the image will become completely transparent. Any number located in this range specifies partial transparency of the background. A negative value cannot be specified. The default value is 1.

Syntax

selector {
	filter: opacity(number);
}

Example

Let's set the transparency of our image to 50%:

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

#elem {
	filter: opacity(50%);
	background: url("bg.png") center / cover no-repeat;
	width: 400px;
	height: 300px;
	border: 1px solid black;
}

Example

Now let's set the transparency to 100%:

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

#elem {
	filter: opacity(100%);
	background: url("bg.png") center / cover no-repeat;
	width: 400px;
	height: 300px;
	border: 1px solid black;
}

Example

Now let's set the opacity function to a value equal to 0:

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

#elem {
	filter: opacity(0);
	background: url("bg.png") center / cover no-repeat;
	width: 400px;
	height: 300px;
	border: 1px solid black;
}

opacity function

Syntax

Example

Example

Example

See also