Adds an option for high contrast labels.

- Uses the colors designated for success to generate labels.
- Works well in the themes I tried.
- Maybe not as smooth, but definitely fresh and a bit easier to
  read IMO.  Nice to have as a backup option.
- Option doesn't add much bloat IMO.
:lipstick: Cleanup.
:lipstick: Cleanup.

- Mostly removing parens and fixing quotes.