diff --git a/urdf/diffbot.materials.xacro b/urdf/diffbot.materials.xacro
index 7fdb6a1..947d0ab 100644
--- a/urdf/diffbot.materials.xacro
+++ b/urdf/diffbot.materials.xacro
@@ -37,4 +37,12 @@ https://github.com/ros-simulation/gazebo_ros_demos/blob/kinetic-devel/rrbot_desc
     <color rgba="1.0 1.0 1.0 1.0" />
   </material>
 
+  <material name="grey2">
+        <color rgba="0.9 0.9 0.9 1.0"/>
+  </material>
+
+  <material name="lightGrey">
+      <color rgba="0.6 0.6 0.6 1.0"/>
+  </material>
+
 </robot>
\ No newline at end of file
diff --git a/urdf/diffbot_description.urdf.xacro b/urdf/diffbot_description.urdf.xacro
index 0ec1044..b8a49b7 100644
--- a/urdf/diffbot_description.urdf.xacro
+++ b/urdf/diffbot_description.urdf.xacro
@@ -25,7 +25,7 @@
     <xacro:property name="chassis_offset" value="0.065"/>
 
     <!-- Materials -->
-    <material name="white">
+    <!-- <material name="white">
         <color rgba="1 1 1 1" />
     </material>
 
@@ -59,7 +59,7 @@
 
     <material name="lightGrey">
         <color rgba="0.6 0.6 0.6 1.0"/>
-    </material>
+    </material> -->
     
     <!-- Base Link -->
     <link name="${prefix}base_link">