Also C Major (Ionian), D Dorian
B Locrian: B C D E F G A. Formula 1 ♭2 ♭3 4 ♭5 ♭6 ♭7. Same notes as C Major (Ionian), D Dorian, E Phrygian. The darkest mode, with a flat 2nd and a flat 5th: its tonic chord is diminished, so it rarely feels at rest. It fits over half-diminished chords.