Why the Model is GRAY

I Want import Warcraft 3 MOdel from HiveWorkshop to Unity Model,
i’ve import the .mdx model into .obj
after i open it in Unity3d, the model is so gray, where is the colour?
how to fix it -(

Your going to need the texture map that goes with the model. From my experience only *.fbx models pack the texture with the model so when imported to unity the “Color” is on the model. *.obj always had to have a uv map to go with the model. Check in the Material folder of unity to see if there is a texture map to go with the model, the material folder open and the model selected drag the texture map to the model.