B Locrian

The B Locrian mode — B C D E F G A — shown across the guitar neck.

Swipe the neck sideways to see the higher frets.

B Locrian is the natural minor with the b2 and b5 — C and F. Those are the notes that give it its character.

The tool shows this from its parent key, C major, with B marked as where Locrian begins, the same seven notes centered on C.