diff --git a/pandora_console/include/rest-api/models/VisualConsole/Items/BarsGraph.php b/pandora_console/include/rest-api/models/VisualConsole/Items/BarsGraph.php
index a7c91122ae..91a7abcd35 100644
--- a/pandora_console/include/rest-api/models/VisualConsole/Items/BarsGraph.php
+++ b/pandora_console/include/rest-api/models/VisualConsole/Items/BarsGraph.php
@@ -54,11 +54,11 @@ final class BarsGraph extends Item
      *
      * @return mixed String representing the grid color (not empty) or null.
      */
-    private function extractGridColor(array $data)
+    private function extractGridColor(array $data): string
     {
         return static::notEmptyStringOr(
             static::issetInArray($data, ['gridColor', 'border_color']),
-            null
+            '#000000'
         );
     }
 
@@ -104,11 +104,11 @@ final class BarsGraph extends Item
         );
 
         switch ($typeGraph) {
-            case 'vertical':
-            return 'vertical';
+            case 'horizontal':
+            return 'horizontal';
 
             default:
-            return 'horizontal';
+            return 'vertical';
         }
     }
 
diff --git a/pandora_console/include/rest-api/models/VisualConsole/Items/DonutGraph.php b/pandora_console/include/rest-api/models/VisualConsole/Items/DonutGraph.php
index 111c6e8373..93ab7bffe8 100644
--- a/pandora_console/include/rest-api/models/VisualConsole/Items/DonutGraph.php
+++ b/pandora_console/include/rest-api/models/VisualConsole/Items/DonutGraph.php
@@ -70,7 +70,7 @@ final class DonutGraph extends Item
                     'border_color',
                 ]
             ),
-            null
+            '#000000'
         );
     }