.single-post .category-general {
    background-color: rgba(68,0,0,0.75)!important;
}

._milend_elementor .iron-audioplayer {
    background-color: rgba(68,0,0,0.75)!important;
}

.single-event .sr_it-single-post .event-wrapper {
    background-color: rgba(68,0,0,0.75)!important;
}