Gazebo can't read color information from dae or stl mesh files

Hi, I want to insert a map that I generate. These maps are generate from point clouds (using PCL) and then, I generate mesh map using MeshLab. In MeshLab and Blender, I can see that the dae or stl files contains color information (in vertices and faces). However in the Gazebo simulator, these meshes are white. I tried to version of these files; 1. exported using MeshLab, 2. exported using Blender. How can I load color information from dae or stl mesh files generated from point clouds?