Controls how much of the background is visible through the element it is applied to.


filter: opacity(<value>);

where a required <value> can be one of the following:

  • Number value: 0, 1
  • Percentage value: 25%, 50%

Note: Value defaults to 1 or 100% leaving element unchanged. A value of 0 and 0% will be completely transparent. Negative values as well as values greater than 1 or 100% are not allowed.

Example 1

Set the opacity of our element to 50%:

.banner-image {
filter: opacity(50%);


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