URDF: different colors in gazebo for one link with multiple visual meshes

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Hi, I have a URDF with a few links. One of the links with multiple visual meshes. The meshes dont have the right origin at the moment, but thats not the point.

Is it possible to give each visual mesh a different color in gazebo or is gazebo only possible to reference one color to the link_name and not to a specific visual tag?

Gazebo reference:

  <gazebo reference="assembly_table">
    <material>Gazebo/White</material>
  </gazebo>

Example link:

 <link...>
    <visual>
      <geometry>
        <mesh filename="package://boroscope_support/meshes/visual/assembly_table/table_top.dae"/>
      </geometry>
      <origin xyz="0.0 0.0 0.0" rpy="0.0 0.0 0.0"/>
    </visual>
    <visual>
      <geometry>
        <mesh filename="package://boroscope_support/meshes/visual/assembly_table/item_table.dae"/>
      </geometry>
      <origin xyz="0.0 0.0 0.0" rpy="0.0 0.0 0.0"/>
    </visual>
    <visual>
      <geometry>
        <mesh filename="package://boroscope_support/meshes/visual/assembly_table/UTS100cc.dae"/>
      </geometry>
      <origin xyz="0.0 0.0 0.0" rpy="0.0 0.0 0.0"/>
    </visual>
    <visual>
      <geometry>
        <mesh filename="package://boroscope_support/meshes/visual/assembly_table/ims300pp.dae"/>
      </geometry>
      <origin xyz="0.0 0.0 0.0" rpy="0.0 0.0 0.0"/>
    </visual>
 </link>