Bootstrap provides classes for color, that can be used for text-color, background-color.
Example 1: Bootstrap 5 provides classes to change the text color
<p class="text-primary">.text-primary</p> <p class="text-secondary">.text-secondary</p> <p class="text-success">.text-success</p> <p class="text-danger">.text-danger</p> <p class="text-warning">.text-warning</p> <p class="text-info">.text-info</p> <p class="text-light bg-dark">.text-light</p> <p class="text-dark">.text-dark</p>
.text-primary
.text-secondary
.text-success
.text-danger
.text-warning
.text-info
.text-light
.text-dark
<div class="p-3 mb-2 bg-primary text-white">.bg-primary</div> <div class="p-3 mb-2 bg-secondary text-white">.bg-secondary</div> <div class="p-3 mb-2 bg-success text-white">.bg-success</div> <div class="p-3 mb-2 bg-danger text-white">.bg-danger</div> <div class="p-3 mb-2 bg-warning text-dark">.bg-warning</div> <div class="p-3 mb-2 bg-info text-dark">.bg-info</div> <div class="p-3 mb-2 bg-light text-dark">.bg-light</div> <div class="p-3 mb-2 bg-dark text-white">.bg-dark</div>
<div class="p-3 mb-2 bg-primary bg-gradient text-white">.bg-primary .bg-gradient</div> <div class="p-3 mb-2 bg-secondary bg-gradient text-white">.bg-secondary .bg-gradient</div> <div class="p-3 mb-2 bg-success bg-gradient text-white">.bg-success .bg-gradient</div> <div class="p-3 mb-2 bg-danger bg-gradient text-white">.bg-danger .bg-gradient</div> <div class="p-3 mb-2 bg-warning bg-gradient text-dark">.bg-warning .bg-gradient</div> <div class="p-3 mb-2 bg-info bg-gradient text-dark">.bg-info .bg-gradient</div> <div class="p-3 mb-2 bg-light bg-gradient text-dark">.bg-light .bg-gradient</div> <div class="p-3 mb-2 bg-dark bg-gradient text-white">.bg-dark .bg-gradient</div>
<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">Light link</a> <a href="#" class="link-dark">Dark link</a>
<div class="p-3 mb-2 text-bg-primary">.text-bg-primary</div> <div class="p-3 mb-2 text-bg-secondary">.text-bg-secondary</div> <div class="p-3 mb-2 text-bg-success">.text-bg-success</div> <div class="p-3 mb-2 text-bg-danger">.text-bg-danger</div> <div class="p-3 mb-2 text-bg-warning">.text-bg-warning</div> <div class="p-3 mb-2 text-bg-info">.text-bg-info</div> <div class="p-3 mb-2 text-bg-light">.text-bg-light</div> <div class="p-3 mb-2 text-bg-dark">.text-bg-dark</div>