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.

I only need very basic color changes in Blender.

Most models are simple Roblox-style low-poly/voxel-like objects.
The job is mainly:
- import the GLTF/OBJ file into Blender
- select the existing material/parts
- change simple colors
- keep the original shape exactly the same
- do not add new geometry
- do not increase the polygon count
- keep it optimized for Roblox
- export the finished model as GLB or FBX

I will give clear color instructions for each model, for example:
- make shirt blue
- make pants black
- make shoes white
- make skin slightly lighter/darker
- keep eyes and small details the same

I need 1 test model first.
If the test looks good, I will send all 40-50 models.

My total budget for the full batch is €15 because this is only simple recoloring, not modeling from scratch.

Please only message me if you are okay with the budget and can keep the models Roblox-friendly.