The chords in the key
Each note of the scale builds a chord. The four-note versions add the seventh.
| Degree | Chord | Notes | Role | With seventh |
|---|---|---|---|---|
| I | D♭ | D♭ – F – A♭ | Tonic: home | D♭maj7 |
| ii | E♭m | E♭ – G♭ – B♭ | Subdominant | E♭m7 |
| iii | Fm | F – A♭ – C | Tonic substitute | Fm7 |
| IV | G♭ | G♭ – B♭ – D♭ | Subdominant | G♭maj7 |
| V | A♭ | A♭ – C – E♭ | Dominant: tension | A♭7 |
| vi | B♭m | B♭ – D♭ – F | Relative tonic | B♭m7 |
| vii° | Cdim | C – E♭ – G♭ | Dominant (leading tone) | — |