I–♭II–I in B♭ Major

Pattern: I – ♭II – I Chords: B♭ – B – B♭

Chord Breakdown

Numeral	Chord	Type	Function
I	B♭ (details)	major	Tonic
♭II	B (details)	major	Supertonic
I	B♭ (details)	major	Tonic

Harmonic Analysis

This progression moves through B♭ (Tonic) → B (Supertonic) → B♭ (Tonic).

A striking chromatic movement that lifts the harmony a half step to the Neapolitan chord before returning to the tonic. This creates a momentary sense of displacement and tension that resolves immediately.

Song Examples

Lady Bird — Tadd Dameron
Moment's Notice — John Coltrane

Chord Details

B♭ B

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