.bg-primary
                                                            .bg-info
                                                            .bg-secondary
                                                            .bg-warning
                                                            .bg-danger
                                                            .bg-success
                                                            .bg-gradient-primary
                                                            .bg-gradient-secondary
                                                            .bg-gradient-danger
                                                            .bg-gradient-warning
                                                            .bg-gradient-info
                                                            .bg-gradient-success
                                                            .bg-blue
                                                            .bg-red
                                                            .bg-teal
                                                            .bg-azure
                                                            .bg-orange
                                                            .bg-cyan
                                                            .bg-indigo
                                                            .bg-yellow
                                                            .bg-gray
                                                            .bg-purple
                                                            .bg-lime
                                                            .bg-gray-dark
                                                            .bg-pink
                                                            .bg-green
                                                            .bg-secondary
                                                            Example: <divclass="d-flex align-items-center mb-3 mt-3"><divclass="w-7 h-7 bg-blue rounded mr-4"></div><div><strong>Blue</strong><br/><code>.bg-blue</code></div></div>