Even on Linux one is confronted with coloring problems e.g. when trying to have syntax highlighting within the debugger.

Term::ReadLine is only a wrapper using which ever underlying module is installed. The full list of features is only supplied by Term::ReadLine::Gnu , which builds on a Gnu-Readline programmed in C.

So what are you using on Win???

Since finding support for these issues in GNU-Readline isn't easy, I suppose that only reimplementing the full library in Perl can help here.

Are you volunteering?