Fonts have 5 font materials (Face, Border, Stroke, Neo & Shadow). Fonts also have 5 faces (Face, Border, Stroke, Neo & Shadow). Faces can have global materials applied to them. So you can set the font material of Border to be Red and then apply a blue Global Material to the Border's face - you'd end up with the border being Blue, because the material on the face is on top of the font material.
A little confusing but intentional to allow for huge flexibly.
In Visual Logic the Font Material are a little hard to use because the names don't carry through right now. So I find it easier to apply a Global Material to a face of the font. Like I did in the above example.
Here's a copy of my project so you can see what I did:
https://transfer.rossvideo.com/f/c80b2cf66#XPression