Feature Request: Colorize or Substitute Unicode Alternatives for Backslash-Escaped Characters

[gtusr]

Would it be possible to add a feature that allows color to be used instead of backslashes in order escape characters?

I'm imagining a tool that colors all characters that are to be interpreted literally as black and uses one color for grouping parentheses, another for quantifiers, and yet another for character ranges, etc.

As an alternative, it would also be useful if one could configure the package to substitute rarely used unicode characters of the user's choice for escaped parentheses, the full stop, quantifiers, etc.