I–II–IV–iii in B♭ Major

Pattern: I – II – IV – iii Chords: B♭ – C – E♭ – Dm

Chord Breakdown

Numeral	Chord	Type	Function
I	B♭ (details)	major	Tonic
II	C (details)	major	Supertonic
IV	E♭ (details)	major	Subdominant
iii	Dm (details)	minor	Mediant

Harmonic Analysis

This progression moves through B♭ (Tonic) → C (Supertonic) → E♭ (Subdominant) → Dm (Mediant).

A progression that introduces a major II chord borrowed from the Lydian mode, giving the harmony a bright, lifted quality. The resolution to IV and then iii provides an unexpected but satisfying melodic path.

Song Examples

Inner Urge — Joe Henderson
Maiden Voyage — Herbie Hancock

Chord Details

B♭ C E♭ Dm

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