B7 (B dominant 7th): B D# F# A. Formula 1 3 5 ♭7. A major triad with a minor 7th: the tritone between its 3rd and ♭7 pulls toward the tonic. The V chord of every key, and the I chord of the blues.
Made of4
Contains & part of19
Inversions4
- B77
Root position · B D# F# A
- B7/D#6/5
1st inversion · D# F# A B
- B7/F#4/3
2nd inversion · F# A B D#
- B7/A4/2
3rd inversion · A B D# F#