HIIT twice a week: how hard is hard enough?
Jul 5, 2026 in Cardio
Colored Links
Colored link helpers tint a link with a theme colour, including hover and focus states, while the link opacity, offset and underline helpers fine-tune how the text and its underline look. Combine them for footers, inline copy, navigation and table actions.
1All link colours
link-* classes for every theme colour, plus link-body-emphasis for high contrast text.
<div class="d-flex flex-wrap gap-3">
<a href="#" class="link-primary">Primary link</a><a href="#" class="link-secondary">Secondary link</a><a href="#" class="link-success">Success link</a><a href="#" class="link-danger">Danger link</a><a href="#" class="link-warning">Warning link</a><a href="#" class="link-info">Info link</a><a href="#" class="link-light bg-dark px-1 rounded">Light link</a><a href="#" class="link-dark">Dark link</a><a href="#" class="link-body-emphasis">Body emphasis link</a>
</div>2Inline links in copy
Links inside a paragraph in the primary colour with an offset, softened underline.
Open 24 hours, so you can train whenever it suits your day. Read the setup guide or browse the yoga section.
<p class="mb-0">Open 24 hours, so you can train whenever it suits your day. Read the <a href="#" class="link-primary link-offset-2 link-underline-opacity-25 link-underline-opacity-100-hover">setup guide</a> or browse the <a href="#" class="link-primary link-offset-2 link-underline-opacity-25 link-underline-opacity-100-hover">yoga</a> section.</p>3Footer columns
Muted footer links with link-secondary that turn darker with link-body-emphasis on the heading.
<div class="row g-3 small">
<div class="col-6 col-md-3">
<a href="#" class="link-body-emphasis fw-semibold text-decoration-none d-block mb-2">Product</a> <a href="#" class="link-secondary d-block">Features</a><a href="#" class="link-secondary d-block">Pricing</a>
</div>
<div class="col-6 col-md-3">
<a href="#" class="link-body-emphasis fw-semibold text-decoration-none d-block mb-2">Company</a> <a href="#" class="link-secondary d-block">About</a><a href="#" class="link-secondary d-block">Jobs</a>
</div>
</div>4Sidebar navigation
link-body-emphasis for menu items and link-primary for the current page.
<nav aria-label="Account">
<ul class="list-unstyled mb-0 vstack gap-2">
<li><a href="#" class="link-primary fw-semibold" aria-current="page" style="text-decoration:none"><i class="bi bi-speedometer2" aria-hidden="true"></i> Dashboard</a></li>
<li><a href="#" class="link-body-emphasis" style="text-decoration:none"><i class="bi bi-receipt" aria-hidden="true"></i> Orders</a></li>
<li><a href="#" class="link-body-emphasis" style="text-decoration:none"><i class="bi bi-people-fill" aria-hidden="true"></i> Customers</a></li>
<li><a href="#" class="link-body-emphasis" style="text-decoration:none"><i class="bi bi-gear-fill" aria-hidden="true"></i> Settings</a></li>
</ul>
</nav>5Danger zone link
link-danger marks destructive actions in a settings panel.
<div class="border border-danger-subtle rounded p-3">
<h3 class="h6">Danger zone</h3>
<p class="small mb-2">Closing your account removes all Hive Labs data after 30 days.</p>
<a href="#" class="link-danger link-offset-1 fw-semibold"><i class="bi bi-trash-fill" aria-hidden="true"></i> Close account</a>
</div>6Link opacity scale
link-opacity-10 to link-opacity-100 fade the link colour.
<figure class="mb-0">
<div inert>
<div class="vstack gap-1">
<a class="link-opacity-10" href="#">Link opacity 10</a><a class="link-opacity-25" href="#">Link opacity 25</a><a class="link-opacity-50" href="#">Link opacity 50</a><a class="link-opacity-75" href="#">Link opacity 75</a><a class="link-opacity-100" href="#">Link opacity 100</a>
</div>
</div>
<figcaption class="small text-body-secondary mt-2 mb-0">Below 100 the link text no longer reaches 4.5:1 - use the faded steps for hover states and decoration, not for links people must read.</figcaption>
</figure>7Tag cloud
Popular tags larger in the brand colour, less used tags smaller in grey; the underline shows on hover.
<div class="d-flex flex-wrap gap-3 align-items-baseline">
<a href="#" class="fs-4 link-primary link-underline-opacity-0 link-underline-opacity-100-hover">#guide</a><a href="#" class="fs-6 link-secondary link-underline-opacity-0 link-underline-opacity-100-hover">#community</a><a href="#" class="fs-5 link-primary link-underline-opacity-0 link-underline-opacity-100-hover">#tips</a><a href="#" class="small link-secondary link-underline-opacity-0 link-underline-opacity-100-hover">#insights</a><a href="#" class="fs-5 link-primary link-underline-opacity-0 link-underline-opacity-100-hover">#news</a><a href="#" class="fs-6 link-secondary link-underline-opacity-0 link-underline-opacity-100-hover">#tutorial</a>
</div>8Hover reveals the underline
link-underline-opacity-0 hides the underline until link-underline-opacity-75-hover shows it.
<p class="mb-0"> <a href="#" class="link-dark link-underline-dark link-underline-opacity-0 link-underline-opacity-75-hover">Looking back at a busy season</a> · <a href="#" class="link-success link-underline-success link-underline-opacity-0 link-underline-opacity-75-hover">Five stretches for desk workers</a> </p>9Underline offsets
link-offset-1 to 3 move the underline away from the text; the -hover variant animates it.
<div class="vstack gap-2">
<a class="link-offset-1" href="#">Underline offset 1</a><a class="link-offset-2" href="#">Underline offset 2</a><a class="link-offset-3" href="#">Underline offset 3</a><a class="link-offset-1 link-offset-3-hover link-underline link-underline-opacity-50" href="#">Offset grows on hover</a>
</div>10Coloured underlines
Neutral text with a theme coloured underline using link-underline-*.
<div class="d-flex flex-wrap gap-3">
<a href="#" class="link-body-emphasis link-offset-2 link-underline-primary">Primary underline</a><a href="#" class="link-body-emphasis link-offset-2 link-underline-success">Success underline</a><a href="#" class="link-body-emphasis link-offset-2 link-underline-warning">Warning underline</a><a href="#" class="link-body-emphasis link-offset-2 link-underline-danger">Danger underline</a>
</div>11Table row actions
Edit and delete links coloured by intent in the last column.
<div class="table-responsive">
<table class="table mb-0">
<thead>
<tr>
<th scope="col">Order</th>
<th scope="col">Date</th>
<th scope="col" class="text-end">Actions</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="#" class="link-body-emphasis fw-semibold text-decoration-none">#INV-9719</a></td>
<td>Jul 2, 2026</td>
<td class="text-end text-nowrap"><a href="#" class="link-primary me-2">Edit</a><a href="#" class="link-danger">Delete</a></td>
</tr>
<tr>
<td><a href="#" class="link-body-emphasis fw-semibold text-decoration-none">#TX-5549</a></td>
<td>Jan 4, 2026</td>
<td class="text-end text-nowrap"><a href="#" class="link-primary me-2">Edit</a><a href="#" class="link-danger">Delete</a></td>
</tr>
<tr>
<td><a href="#" class="link-body-emphasis fw-semibold text-decoration-none">#INV-3094</a></td>
<td>Apr 18, 2026</td>
<td class="text-end text-nowrap"><a href="#" class="link-primary me-2">Edit</a><a href="#" class="link-danger">Delete</a></td>
</tr>
</tbody>
</table>
</div>12Post titles
Headline links in body colour that only underline on hover, with a secondary category link.
What our members asked us most
Sep 20, 2026 in Strength
A beginner's guide to strength training
Jul 5, 2026 in HIIT
<div class="vstack gap-3">
<article>
<h3 class="h6 mb-1"><a href="#" class="link-body-emphasis link-underline-opacity-0 link-underline-opacity-100-hover">HIIT twice a week: how hard is hard enough?</a></h3>
<p class="small text-body-secondary mb-0">Jul 5, 2026 in <a href="#" class="link-secondary">Cardio</a></p>
</article>
<article>
<h3 class="h6 mb-1"><a href="#" class="link-body-emphasis link-underline-opacity-0 link-underline-opacity-100-hover">What our members asked us most</a></h3>
<p class="small text-body-secondary mb-0">Sep 20, 2026 in <a href="#" class="link-secondary">Strength</a></p>
</article>
<article>
<h3 class="h6 mb-1"><a href="#" class="link-body-emphasis link-underline-opacity-0 link-underline-opacity-100-hover">A beginner's guide to strength training</a></h3>
<p class="small text-body-secondary mb-0">Jul 5, 2026 in <a href="#" class="link-secondary">HIIT</a></p>
</article>
</div>13Contact list
Email and phone links with an icon and the info colour.
<ul class="list-unstyled vstack gap-2 mb-0">
<li><i class="bi bi-envelope-fill" aria-hidden="true"></i> <a href="mailto:hello@example.com" class="link-info link-offset-1">hello@example.com</a></li>
<li><i class="bi bi-telephone-fill" aria-hidden="true"></i> <a href="tel:+15550100" class="link-info link-offset-1">+1 (555) 722-2536</a></li>
<li><i class="bi bi-geo-alt-fill" aria-hidden="true"></i> <a href="#" class="link-info link-offset-1">2 Harbour Road, Austin</a></li>
</ul>14Links on dark backgrounds
link-light and link-warning stay readable on a dark panel marked data-ui-theme="dark" (status links then use their light shade).
<div class="text-bg-dark rounded p-3" data-ui-theme="dark">
<p class="mb-2">Start in minutes and get help from a real person whenever you need it.</p>
<a href="#" class="link-light link-offset-2 me-3">Learn more</a> <a href="#" class="link-warning link-offset-2">Upgrade now</a>
</div>15Legal links
Small link-secondary links with faint underlines for the fine print.
By continuing you agree to the Terms of Service and Privacy Policy.
<p class="small text-body-secondary mb-0">By continuing you agree to the <a href="#" class="link-secondary link-underline-opacity-25">Terms of Service</a> and <a href="#" class="link-secondary link-underline-opacity-25">Privacy Policy</a>.</p>16Icon links
Icon-only links that brighten on hover with link-opacity-*-hover.
<div class="d-flex gap-3 fs-4">
<a href="#" class="link-secondary link-opacity-75 link-opacity-100-hover" aria-label="Community chat"><i class="bi bi-chat-dots-fill" aria-hidden="true"></i></a><a href="#" class="link-secondary link-opacity-75 link-opacity-100-hover" aria-label="Newsletter"><i class="bi bi-envelope-fill" aria-hidden="true"></i></a><a href="#" class="link-secondary link-opacity-75 link-opacity-100-hover" aria-label="RSS feed"><i class="bi bi-rss-fill" aria-hidden="true"></i></a><a href="#" class="link-secondary link-opacity-75 link-opacity-100-hover" aria-label="Photo stream"><i class="bi bi-camera-fill" aria-hidden="true"></i></a>
</div>17Notification with a link
A coloured link inside an alert-style message.
Priya Whitaker commented on Building a workout habit that lasts 6 days ago.
<div class="alert alert-light border d-flex gap-2 mb-0">
<span class="text-primary"><i class="bi bi-chat-left-text-fill" aria-hidden="true"></i></span>
<div class="small">
Priya Whitaker commented on <a href="#" class="link-primary fw-semibold">Building a workout habit that lasts</a> 6 days ago.
</div>
</div>18Previous and next text links
Article pagination with link-body-emphasis and an arrow.
<nav class="d-flex justify-content-between small" aria-label="Article pages">
<a href="#" class="link-body-emphasis link-offset-2 link-underline-opacity-25">← Running your first 5K: an eight-week plan</a> <a href="#" class="link-body-emphasis link-offset-2 link-underline-opacity-25 text-end">Our most popular classes this month →</a>
</nav>19Status links
Each status filter uses its matching link colour.
<div class="d-flex flex-wrap gap-3 small">
<a href="#" class="link-success">Completed (43)</a> <a href="#" class="link-warning">In review (7)</a> <a href="#" class="link-danger">Overdue (1)</a> <a href="#" class="link-secondary">Archived (18)</a>
</div>20Breadcrumb with coloured links
link-secondary breadcrumb links leading to the current page.
<nav aria-label="breadcrumb">
<ol class="breadcrumb mb-0">
<li class="breadcrumb-item"><a href="#" class="link-secondary link-underline-opacity-0 link-underline-opacity-100-hover">Home</a></li>
<li class="breadcrumb-item"><a href="#" class="link-secondary link-underline-opacity-0 link-underline-opacity-100-hover">Strength</a></li>
<li class="breadcrumb-item active" aria-current="page">Personal training</li>
</ol>
</nav>