What's best syntax highlighting scheme for G4's standard output?

Say, for material table, cuts and track trees.

I’m not sure this would be possible (at least easily) without implementing a custom version of G4cout that supported highlighting. Even then, filtering/regexing the input to that would be awkward.

We’d of course be interested if anyone else has recommendation, suggestions, and/or requirements here.

No, i mean, syntax highlighting for “.out” files, where stdout is sent, at least. Yeah, i’m also interested in positive experience.