pert:
I've done my best to document the theme properties here:If you find the purpose of any of the properties I've documented as "Doesn't appear to have any effect." please let me know and I'll update the documentation.
Just for giggles I checked a few. These, among others:
editor.literal1.style - Doesn't appear to have any effect.
editor.literal2.style - Doesn't appear to have any effect.
editor.variable.style - Doesn't appear to have any effect.
don't even appear in the dark theme file.
Oh, well perhaps a future version will shed some light.