Raoul Wegat

For each page you’ll need a different class. Eg.

.page-id-1 {
    background-color: #ccc;
}
.page-id-2 {
    background-color: #ddd;
}
.page-id-2 {
    background-color: #eee;
}

Try this:

add_action( 'wp_loaded', 'thissite_blog_public' );
function thissite_blog_public() {
	if (get_option('blog_public') == "0") {
		add_filter( 'pre_option_blog_public', '__return_true' );
	}
}