background color fixed in challenges section

blocks/portfolio-conclusion-section.php

@@ -51,7 +51,6 @@ if (isset($cmws) && is_array($cmws) && !empty($cmws)):
             <?php foreach ($cmws_gal as $i => $gallery_item):
               $img = $gallery_item['img'] ?: '';
               $layout = $gallery_item['layout'] ?: '';
-              $new = $layout[0];
               $class_name = !empty($layout) ? explode(':', $layout[0]) : 'none';
               $class_name = $class_name[0];?>
               <div class="gallery-item <?php echo $class_name; ?>">

blocks/portfolio-text-image-section.php

@@ -54,13 +54,15 @@ if(have_rows('content')):
   <?php $index=0;?>
   <?php while(have_rows('content')):
     the_row();
+    $bgClass = get_sub_field('background_colour');
+    $class_name = !empty($bgClass) ? explode(':', $bgClass) : 'none';
+    $class_name = $class_name[0];
     $image_position = get_sub_field('image_position');
     $image = get_sub_field('image');
     if($index===0):
     ?>
 
-  <div class="ONLY-TEXT-SECTION py-80 
-    <?php echo (get_sub_field('background_colour')=='dark')?'background-dark':'bg-primary';?>">
+  <div class="ONLY-TEXT-SECTION py-80 <?php echo $class_name;?>">
     <div class="container">
       <div class="row justify-content-between">
         <div class="col-lg-5 col-xl-4 order-lg-2">