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55 | ---
layout: docs
title: Color and background
description: Set a background color with contrasting foreground color.
group: helpers
toc: true
added:
version: "5.2"
---
## Overview
Color and background helpers combine the power of our [`.text-*` utilities]({{< docsref "/utilities/colors" >}}) and [`.bg-*` utilities]({{< docsref "/utilities/background" >}}) in one class. Using our Sass `color-contrast()` function, we automatically determine a contrasting `color` for a particular `background-color`.
{{< callout warning >}}
**Heads up!** There's currently no support for a CSS-native `color-contrast` function, so we use our own via Sass. This means that customizing our theme colors via CSS variables may cause color contrast issues with these utilities.
{{< /callout >}}
{{< example >}}
{{< text-bg.inline >}}
{{- range (index $.Site.Data "theme-colors") }}
<div class="text-bg-{{ .name }} p-3">{{ .name | title }} with contrasting color</div>
{{- end -}}
{{< /text-bg.inline >}}
{{< /example >}}
{{< callout info >}}
{{< partial "callouts/warning-color-assistive-technologies.md" >}}
{{< /callout >}}
## With components
Use them in place of combined `.text-*` and `.bg-*` classes, like on [badges]({{< docsref "/components/badge#background-colors" >}}):
{{< example >}}
<span class="badge text-bg-primary">Primary</span>
<span class="badge text-bg-info">Info</span>
{{< /example >}}
Or on [cards]({{< docsref "/components/card#background-and-color" >}}):
{{< example >}}
<div class="card text-bg-primary mb-3" style="max-width: 18rem;">
<div class="card-header">Header</div>
<div class="card-body">
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
</div>
</div>
<div class="card text-bg-info mb-3" style="max-width: 18rem;">
<div class="card-header">Header</div>
<div class="card-body">
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
</div>
</div>
{{< /example >}}
|
|
