How to import colored meshes

I have just recently started using blender, and now I’m having trouble knowing how to import coloured meshes to ROBLOX. I know this has been asked before, but I can’t find the topics. The problem is that whenever I try to make a mesh and import it, its always grey. How do I make it so there’s colour?


Here’s a thread with a solution: How do I export a coloured model from blender?