How do I make a field on the Configurable List Read Only?

I'm trying to make a few of the fields on the configurable list read only.  Can I do this using CSS code?  Can you help me with how to write that code?

There is not option to set field "readonly" on the configurable list widget, but you can fake it through CSS code, example: 

.col5 input {

  pointer-events: none;

}

Let us know if you need more help.