How do you color-code TWINE 2.0 Passages inside the Editor?

I was just wondering how to make it so I could tag certain passages in the Editor so it'd show as different colors in the editor - I've been adding entries to it - and it's getting a bit unwieldy. So I would like to be able to color code paths of sorts, if that makes any sense.

To be clear, I do not want to change the CSS for the passages when we play the CYOA. Just the Editor's 'Passage/Nodes'.