Key of B Major

Everything the key of B major contains: its scale, its seven diatonic chords, and its closest relatives.

The key of B major is built on the B major scale. Harmonizing that scale in thirds yields its seven diatonic chords: B – C#m – D#m – E – F# – G#m – A#°. Its relative minor — the key sharing exactly the same notes — is G# minor, and its parallel minor is B minor.