The colors are material colors. The file consists of two objects, Drone Body and Drone Head. The head of the drone can be extended and rotated to convey certain emotions.
Only the following file formats work with materials: .fbx (Autodesk, supported by most 3D programs) .c4d (Cinema 4D) .dae (COLLADA)
The following file formats are also available, but they wont include correct materials (due to file format limitations): .3ds (3D Studio) .obj (generic format supported by most 3D programs) .dxf (AutoCAD) .stl (stereolithography CAD)
Similar robots and drones are available under my name.