.bg-dark-99 { background-color: rgba(33, 37, 41, .99); } .bg-dark-97 { background-color: rgba(33, 37, 41, .97); } @media (max-width: 767px) { .bg-dark-title { background-color: rgba(33, 37, 41, .99); } .bg-dark-content { background-color: rgba(33, 37, 41, .97); } }