Chromatic Mediants
Two major chords, a 3rd apart, with almost nothing in common on paper — and yet they connect with a cinematic, gliding color no functional progression can match.
What is a chromatic mediant?
A mediant relationship just means two chords whose roots sit a 3rd apart. In C major, the diatonic mediants are iii (E minor) and vi (A minor) — both built entirely from notes in the C major scale. A chromatic mediant keeps that same 3rd-apart root relationship, but uses a chord that isn't diatonic — like C major moving to E major instead of the expected E minor, or to Ab major, a chord with no direct diatonic role in C at all.
Four flavors, one relationship
Chromatic mediants come in a few standard flavors, all built by moving a major or minor 3rd up or down while keeping the same chord quality. Moving up a major 3rd from C major lands on E major; moving down a major 3rd lands on Ab major; moving up a minor 3rd lands on Eb major; moving down a minor 3rd lands on A major. Each keeps at least one common tone with C major, which is part of why the ear accepts the jump even though it breaks every rule of normal key-based function.
Common questions
What is a chromatic mediant?
A chord relationship where two roots are a 3rd apart but the chords aren't diatonically related — like C major moving to E major instead of the diatonic iii (E minor).
How is a chromatic mediant different from a regular mediant chord?
A diatonic mediant stays inside the key's scale; a chromatic mediant shares the 3rd-apart root but uses a chord outside the diatonic scale, creating a non-functional color shift.
Why do chromatic mediants sound so distinctive?
The chords are a 3rd apart and typically share a common tone, keeping the motion connected — but the relationship falls outside normal functional harmony, so it still feels like a surprising color jump.
Where are chromatic mediants commonly used?
They're a hallmark of Romantic-era classical music and are widely used in film scoring for dramatic color shifts without a full key change.
Explore non-functional harmony
Melody Monkey's Songwriting Studio lets you audition chromatic mediant shifts against any home chord.
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