Background

.bg-primary
.bg-success
.bg-danger
.bg-warning
.bg-info
.bg-gray-100
.bg-dark
.bg-white
<div class="row gx-3">
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-primary text-white" style="height: 100px;">.bg-primary</div>
                            </div>
                            span class="token tag"><div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-success text-white" style="height: 100px;">.bg-success</div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-danger text-white" style="height: 100px;">.bg-danger</div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-warning text-white" style="height: 100px;">.bg-warning</div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-info text-white" style="height: 100px;">.bg-info</div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-gray-100 border" style="height: 100px;">.bg-gray-100</div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-dark text-white" style="height: 100px;">.bg-dark</div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-white " style="height: 100px;">.bg-white</div>
                            </div>
                            </div>
.bg-primary-subtle .text-primary-emphasis
.bg-success-subtle .text-success-emphasis
.bg-danger-subtle .text-danger-emphasis
.bg-warning-subtle .text-warning-emphasis
.bg-info-subtle .text-info-emphasis
<div class="row gx-3">
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-primary-subtle
                                text-primary-emphasis" style="height: 100px;">.bg-primary-subtle
                            .text-primary-emphasis
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-success-subtle
                                text-success-emphasis" style="height: 100px;">.bg-success-subtle
                            .text-success-emphasis
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-danger-subtle text-danger-emphasis" style="height: 100px;">.bg-danger-subtle
                            .text-danger-emphasis
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-warning-subtle
                                text-warning-emphasis" style="height: 100px;">.bg-warning-subtle
                            .text-warning-emphasis
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-info-subtle text-info-emphasis" style="height: 100px;">.bg-info-subtle
                            .text-info-emphasis
                            </div>
                            </div>
                            </div>

Theme Dark

.bg-primary-dark .text-primary-lighter
.bg-success-dark .text-success-lighter
.bg-danger-dark .text-danger-lighter
.bg-warning-dark .text-warning-lighter
.bg-info-dark .text-info-lighter
<div class="row gx-3">
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-primary-dark text-primary-lighter" style="height: 100px;">.bg-primary-dark
                            .text-primary-lighter
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-success-dark text-success-lighter" style="height: 100px;">.bg-success-dark
                            .text-success-lighter
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-danger-dark text-danger-lighter" style="height: 100px;">.bg-danger-dark
                            .text-danger-lighter
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-warning-dark text-warning-lighter" style="height: 100px;">.bg-warning-dark
                            .text-warning-lighter
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-info-dark text-info-lighter" style="height: 100px;">.bg-info-dark
                            .text-info-lighter
                            </div>
                            </div>
                            </div>

Theme Darker

.bg-primary-dark .text-primary-light
.bg-success-darker .text-success-light
.bg-danger-darker .text-danger-light
.bg-warning-darker .text-warning-light
.bg-info-darker .text-info-light
<div class="row gx-3">
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-primary-dark text-primary-lighter" style="height: 100px;">.bg-primary-dark
                            .text-primary-lighter
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-success-dark text-success-lighter" style="height: 100px;">.bg-success-dark
                            .text-success-lighter
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-danger-dark text-danger-lighter" style="height: 100px;">.bg-danger-dark
                            .text-danger-lighter
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-warning-dark text-warning-lighter" style="height: 100px;">.bg-warning-dark
                            .text-warning-lighter
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-info-dark text-info-lighter" style="height: 100px;">.bg-info-dark
                            .text-info-lighter
                            </div>
                            </div>
                            </div>
.bg-primary .bg-gradient
.bg-success .bg-gradient
.bg-danger .bg-gradient
.bg-warning .bg-gradient
.bg-info .bg-gradient
 <div class="row gx-3">
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-primary bg-gradient text-white" style="height: 100px;">.bg-primary
                            .bg-gradient
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-success bg-gradient text-white" style="height: 100px;">.bg-success
                            .bg-gradient
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-danger bg-gradient text-white" style="height: 100px;">.bg-danger
                            .bg-gradient
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-warning bg-gradient text-white" style="height: 100px;">.bg-warning
                            .bg-gradient
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-info bg-gradient text-white" style="height: 100px;">.bg-info
                            .bg-gradient
                            </div>
                            </div>
                            </div>

Light Gradient

.bg-primary .bg-gradient
.bg-success .bg-gradient
.bg-danger .bg-gradient
.bg-warning .bg-gradient
.bg-info .bg-gradient
<!-- background color -->
                            <div class="row gx-3">
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-primary bg-gradient text-white" style="height: 100px;">.bg-primary
                            .bg-gradient
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-success bg-gradient text-white" style="height: 100px;">.bg-success
                            .bg-gradient
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-danger bg-gradient text-white" style="height: 100px;">.bg-danger
                            .bg-gradient
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-warning bg-gradient text-white" style="height: 100px;">.bg-warning
                            .bg-gradient
                            </div>
                            </div>
                            <div class="col-lg-4 col-12">
                            <div class="p-2 mb-2 bg-info bg-gradient text-white" style="height: 100px;">.bg-info
                            .bg-gradient
                            </div>
                            </div>
                            </div>
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