--- layout: docs title: Opacity description: Control the opacity of elements. group: utilities added: "5.1" --- The `opacity` property sets the opacity level for an element. The opacity level describes the transparency level, where `1` is not transparent at all, `.5` is 50% visible, and `0` is completely transparent. Set the `opacity` of an element using `.opacity-{value}` utilities.
100%
75%
50%
25%
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``` ### Utilities API Opacity utilities are declared in our utilities API in `scss/_utilities.scss`. [Learn how to use the utilities API.]({{< docsref "/utilities/api#using-the-api" >}}) {{< scss-docs name="utils-opacity" file="scss/_utilities.scss" >}}