PluralKit/dashboard/styles/dark.scss

@import "../node_modules/bootstrap-dark-5/scss/variables-alt"; 

.dark {
    .navbar.bg-light {
        background-color: $body-bg-alt !important;
    }
    
    .footer.bg-light {
        background-color: $dark-alt !important;
    }
    
    .nav-item {
        .btn.btn-transparent {
            color: rgba(250,250,250,.55);
        }
    }

    // bootstrap
    .nav-tabs * .nav-link {
        background-color: $body-bg-alt !important;
    }

    //svelecte
    .svelecte-control .sv-control, .sv-content, .sv-dropdown, .sv-item, .sv-item-content {
        color: $body-color-alt !important; //this can also be optionally overwritten
        background-color: $body-bg-alt !important;
    }

    .sv-item-btn {
        background-color: $light-alt !important;
    }

    // discord markdown
    .d-spoiler {
        color: $dark-alt; //overwrite
        background-color: $dark-alt; //overwrite
    }

    .d-spoiler::selection {
        color: $dark-alt; //overwrite
    }
    
    .d-spoiler:active {
        color: $body-color-alt; //overwrite
    }
}