.page-template page-template-page-templates page-template-page_fullwidth page-template-page-templatespage_fullwidth-php page page-id-11 logged-in siteorigin-panels,
.page-id-11 .arkaplan {
background-color: #f8cc3d;
}

yazdım, hata var kırma ihtimali var diyor kaydetmedim.