Multiple texture colors on object Im new to blender and am learning to create characters.  I modeled this using good topology all around.(I THOUGHT)  to my surprise when I added the subdivision modifier, and went to sculpt, my object has theses different color faces.  I can sculpt and texture on the surface just fine but when i go to paint it or render it I just want to make sure that this odd looking thing is not trying to prepare me for a future problem. Ive checked my mesh, recalculated normals, did a smart uv unwrap, prayed and, even opened up a new blender and copied/paste the object.  Please help.  I know its user error so please show me the error in my ways.
I think these are face sets, as explained here by Blender Guru, they are a kind of masks that you can create in Sculpt mode in order to delimit certain areas:

To remove the face sets you can select the tool again, Ctrl left click on a grey area and paint on the colored areas. Or you can simply deactivate the option in the Viewport Overlays panel: