Need Dark theme support

Hi,
Please try below custom CSS in style.css file or if you are using MyThemeShop theme, then you can paste this code in Theme Options Panel >> Styling >> Custom CSS

.wp_review_tab_widget_content .inside {
    background: #222!important;
}
.wp_review_tab_widget_content {
    border-color: #000!important;
}
.wp_review_tab_widget_content .tab-content li {
    border-bottom-color: #000!important;
}
.wp_review_tab_widget_content .tab_title.selected a {
    background: #222!important;
    border-bottom-color: #222!important;
}
.wp_review_tab_widget_content .tab_title a {
    background: #000!important;
    border-left-color: #000!important;
    border-bottom: 000!important;
}
.inside .review-total-only.small-thumb .review-result-wrapper i {
    color: #FFA300!important;
}
.review-total-only.review-type-point,.review-total-only.review-type-percentage {
    background: #FFA300!important;
}

Hope this helps, thanks.