Added in v5.2
View on GitHub
Color and background
Set a background color with contrasting foreground color.
On this page
Übersicht
Color and background helpers combine the power of our .text-*
utilities and .bg-*
utilities in one class. Using our Sass color-contrast()
function, we automatically determine a contrasting color
for a particular background-color
.
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.
Primary with contrasting color
Secondary with contrasting color
Success with contrasting color
Danger with contrasting color
Warning with contrasting color
Info with contrasting color
Light with contrasting color
Dark with contrasting color
<div class="text-bg-primary p-3">Primary with contrasting color</div>
<div class="text-bg-secondary p-3">Secondary with contrasting color</div>
<div class="text-bg-success p-3">Success with contrasting color</div>
<div class="text-bg-danger p-3">Danger with contrasting color</div>
<div class="text-bg-warning p-3">Warning with contrasting color</div>
<div class="text-bg-info p-3">Info with contrasting color</div>
<div class="text-bg-light p-3">Light with contrasting color</div>
<div class="text-bg-dark p-3">Dark with contrasting color</div>
Accessibility tip: Using color to add meaning only provides a visual indication, which will not be conveyed to users of assistive technologies like screen readers. Please ensure the meaning is obvious from the content itself (e.g., the visible text with a sufficient color contrast) or is included through alternative means, such as additional text hidden with the
.visually-hidden
class.
With components
Use them in place of combined .text-*
and .bg-*
classes, like on badges:
Primary
Info
<span class="badge text-bg-primary">Primary</span>
<span class="badge text-bg-info">Info</span>
Or on cards:
Header
Some quick example text to build on the card title and make up the bulk of the card's content.
Header
Some quick example text to build on the card title and make up the bulk of the card's content.
<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>