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----
-layout: docs
-title: Background
-description: Convey meaning through `background-color` and add decoration with gradients.
-group: utilities
-toc: true
----
-
-## Background color
-
-Similar to the contextual text color classes, set the background of an element to any contextual class. Background utilities **do not set `color`**, so in some cases you'll want to use `.text-*` [color utilities]({{< docsref "/utilities/colors" >}}).
-
-{{< example >}}
-{{< colors.inline >}}
-{{- range (index $.Site.Data "theme-colors") }}
-<div class="p-3 mb-2 bg-{{ .name }}{{ if .contrast_color }} text-{{ .contrast_color }}{{ else }} text-white{{ end }}">.bg-{{ .name }}</div>
-{{- end -}}
-{{< /colors.inline >}}
-<div class="p-3 mb-2 bg-body text-dark">.bg-body</div>
-<div class="p-3 mb-2 bg-white text-dark">.bg-white</div>
-<div class="p-3 mb-2 bg-transparent text-dark">.bg-transparent</div>
-{{< /example >}}
-
-## Background gradient
-
-By adding a `.bg-gradient` class, a linear gradient is added as background image to the backgrounds. This gradient starts with a semi-transparent white which fades out to the bottom.
-
-Do you need a gradient in your custom CSS? Just add `background-image: var(--bs-gradient);`.
-
-{{< markdown >}}
-{{< colors.inline >}}
-{{- range (index $.Site.Data "theme-colors") }}
-<div class="p-3 mb-2 bg-{{ .name }} bg-gradient{{ with .contrast_color }} text-{{ . }}{{ else }} text-white{{ end }}">.bg-{{ .name }}.bg-gradient</div>
-{{- end -}}
-{{< /colors.inline >}}
-{{< /markdown >}}
-
-## Opacity
-
-<small class="d-inline-flex px-2 py-1 font-monospace text-muted border rounded-3">Added in v5.1.0</small>
-
-As of v5.1.0, `background-color` utilities are generated with Sass using CSS variables. This allows for real-time color changes without compilation and dynamic alpha transparency changes.
-
-### How it works
-
-Consider our default `.bg-success` utility.
-
-```css
-.bg-success {
-  --bs-bg-opacity: 1;
-  background-color: rgba(var(--bs-success-rgb), var(--bs-bg-opacity)) !important;
-}
-```
-
-We use an RGB version of our `--bs-success` (with the value of `25, 135, 84`) CSS variable and attached a second CSS variable, `--bs-bg-opacity`, for the alpha transparency (with a default value `1` thanks to a local CSS variable). That means anytime you use `.bg-success` now, your computed `color` value is `rgba(25, 135, 84, 1)`. The local CSS variable inside each `.bg-*` class avoids inheritance issues so nested instances of the utilities don't automatically have a modified alpha transparency.
-
-### Example
-
-To change that opacity, override `--bs-bg-opacity` via custom styles or inline styles.
-
-{{< example >}}
-<div class="bg-success p-2 text-white">This is default success background</div>
-<div class="bg-success p-2" style="--bs-bg-opacity: .5;">This is 50% opacity success background</div>
-{{< /example >}}
-
-Or, choose from any of the `.bg-opacity` utilities:
-
-{{< example >}}
-<div class="bg-success p-2 text-white">This is default success background</div>
-<div class="bg-success p-2 text-white bg-opacity-75">This is 75% opacity success background</div>
-<div class="bg-success p-2 text-dark bg-opacity-50">This is 50% opacity success background</div>
-<div class="bg-success p-2 text-dark bg-opacity-25">This is 25% opacity success background</div>
-<div class="bg-success p-2 text-dark bg-opacity-10">This is 10% opacity success background</div>
-{{< /example >}}
-
-## Sass
-
-In addition to the following Sass functionality, consider reading about our included [CSS custom properties]({{< docsref "/customize/css-variables" >}}) (aka CSS variables) for colors and more.
-
-### Variables
-
-Most `background-color` utilities are generated by our theme colors, reassigned from our generic color palette variables.
-
-{{< scss-docs name="color-variables" file="scss/_variables.scss" >}}
-
-{{< scss-docs name="theme-color-variables" file="scss/_variables.scss" >}}
-
-{{< scss-docs name="variable-gradient" file="scss/_variables.scss" >}}
-
-Grayscale colors are also available, but only a subset are used to generate any utilities.
-
-{{< scss-docs name="gray-color-variables" file="scss/_variables.scss" >}}
-
-### Map
-
-Theme colors are then put into a Sass map so we can loop over them to generate our utilities, component modifiers, and more.
-
-{{< scss-docs name="theme-colors-map" file="scss/_variables.scss" >}}
-
-Grayscale colors are also available as a Sass map. **This map is not used to generate any utilities.**
-
-{{< scss-docs name="gray-colors-map" file="scss/_variables.scss" >}}
-
-RGB colors are generated from a separate Sass map:
-
-{{< scss-docs name="theme-colors-rgb" file="scss/_variables.scss" >}}
-
-And background color opacities build on that with their own map that's consumed by the utilities API:
-
-{{< scss-docs name="utilities-bg-colors" file="scss/_variables.scss" >}}
-
-### Mixins
-
-**No mixins are used to generate our background utilities**, but we do have some additional mixins for other situations where you'd like to create your own gradients.
-
-{{< scss-docs name="gradient-bg-mixin" file="scss/mixins/_gradients.scss" >}}
-
-{{< scss-docs name="gradient-mixins" file="scss/mixins/_gradients.scss" >}}
-
-### Utilities API
-
-Background 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-bg-color" file="scss/_utilities.scss" >}}