Hi Brad,
I’m afraid those are hard coded.
Maybe there is an Addon that let’s you change them, but I doubt that.
You can zoom in on the Nodes, that will also make the sockets larger.
And you will probably not rely on the different colors much….
When they changed the Displacement socket in the Material Output Node from grey to purple, many advanced users didn’t notice that and continued to plug Values into what is now a Vector socket (that might also be due to ‘change blindnesss’, to be fair)!
