diff --git a/src/plugins/qmldesigner/components/edit3d/edit3dviewconfig.h b/src/plugins/qmldesigner/components/edit3d/edit3dviewconfig.h
index b077fed6a46..5c461cc7327 100644
--- a/src/plugins/qmldesigner/components/edit3d/edit3dviewconfig.h
+++ b/src/plugins/qmldesigner/components/edit3d/edit3dviewconfig.h
@@ -40,7 +40,12 @@ public:
 
     static void setColors(AbstractView *view, View3DActionType type, const QList<QColor> &colorConfig)
     {
-        setVariant(view, type, QVariant::fromValue(colorConfig));
+        QVariant param;
+        if (type == View3DActionType::SelectGridColor)
+            param = colorConfig.isEmpty() ? QColor() : colorConfig[0];
+        else
+            param = QVariant::fromValue(colorConfig);
+        setVariant(view, type, param);
     }
 
     template <typename T>
diff --git a/src/tools/qml2puppet/mockfiles/qt6/EditView3D.qml b/src/tools/qml2puppet/mockfiles/qt6/EditView3D.qml
index 220edc24476..8a4db279628 100644
--- a/src/tools/qml2puppet/mockfiles/qt6/EditView3D.qml
+++ b/src/tools/qml2puppet/mockfiles/qt6/EditView3D.qml
@@ -204,8 +204,8 @@ Item {
             }
         }
 
-        if ("selectGridColor" in viewStates && viewStates.selectGridColor.length === 1)
-            viewRoot.gridColor = viewStates.selectGridColor[0]
+        if ("selectGridColor" in viewStates)
+            viewRoot.gridColor = viewStates.selectGridColor
     }
 
     // If resetToDefault is true, tool states not specifically set to anything will be reset to