Simple Blender Color Changes, Roblox Models

I have 40-50 very simple Roblox exported GLTF/OBJ low-poly models. This is NOT a modeling job. You do not need to create new models. You do not need to sculpt, rig, animate, UV unwrap, texture paint, or add details... (Budget: €8 - €30 EUR, Jobs: 3D Animation, 3D Art, 3D Design, 3D Modelling, 3D Rendering, Blender, Maya, Roblox)