PluralKit/styles/dark.scss

.dark > * {
    .navbar.bg-light {
        background-color: var(--bs-body-bg) !important;
    }
    
    .footer.bg-light {
        background-color: var(--bs-dark) !important;
    }
    
    .description a {
        color: #159bd4 !important;
    }
}