> The only good syntax highlight to me is 00 and perhaps FF. But that's my opinion of course.

Would probably make the most sense to have various ranges you can enable depending on what you’re looking for (or to look for patterns) e.g. for single byte coloration I could see

- nul

- printable / non-printable ascii

- non-ascii

- UTF8 leading / continuation

- separators

- start/end pairs (both printable and non printable)