I–♭VII–I in B♭ Major

Pattern: I – ♭VII – I Chords: B♭ – A♭ – B♭

Chord Breakdown

Numeral	Chord	Type	Function
I	B♭ (details)	major	Tonic
♭VII	A♭ (details)	major	Subtonic
I	B♭ (details)	major	Tonic

Harmonic Analysis

This progression moves through B♭ (Tonic) → A♭ (Subtonic) → B♭ (Tonic).

Using the flat seventh chord borrowed from the Mixolydian mode, this progression creates a gritty, bluesy slide effect. The ♭VII adds a raw, rebellious quality that defines blues rock.

Song Examples

Sympathy for the Devil — The Rolling Stones
Whole Lotta Love — Led Zeppelin

Chord Details

B♭ A♭

More Progressions in B♭ 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