I7–IV7–V7 in D♭ Major

Pattern: I7 – IV7 – V7 Chords: D♭7 – G♭7 – A♭7

Chord Breakdown

Numeral	Chord	Type	Function
I7	D♭7 (details)	dominant seventh	Tonic
IV7	G♭7 (details)	dominant seventh	Subdominant
V7	A♭7 (details)	dominant seventh	Dominant

Harmonic Analysis

This progression moves through D♭7 (Tonic) → G♭7 (Subdominant) → A♭7 (Dominant).

Using all dominant seventh chords, this three-chord progression is the harmonic DNA of the blues. The seventh chords add grit and tension that define the blues sound.

Song Examples

Stormy Monday — T-Bone Walker
The Thrill Is Gone — B.B. King

Chord Details

D♭7 G♭7 A♭7

More Progressions in D♭ Major

I–IV–V–I I–V–vi–IV I–vi–IV–V ii–V–I I–IV–V I–♭VII–IV vi–IV–I–V I–V–vi–iii–IV–I–IV–V I–IV I–V IV–V IV–I