C7 (C dominant 7th): C E G B♭. 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
Scales that contain it18
Extensions1
Inversions4
- C77
Root position · C E G B♭
- C7/E6/5
1st inversion · E G B♭ C
- C7/G4/3
2nd inversion · G B♭ C E
- C7/B♭4/2
3rd inversion · B♭ C E G