scale
Fretboard diagram
C ionian scale — chords and intervals
The harmonized C ionian scale produces the same chord family as the major scale, forming the reference point for all diatonic harmony. Every chord built from this mode occupies a clear functional role: tonic, subdominant, or dominant. The diatonic chords of C ionian are CMaj7, Dm7, Em7, FMaj7, G7, Am7, Bm7b5. The I-vi-IV-V turnaround is a classic pop foundation, while the I-iii-vi-ii-V chain creates elegant descending-fifth motion ideal for standards and ballads. Commonly used in Pop, Classical, Folk, Country. Notable players include The Beatles, Bob Dylan, James Taylor.
The C ionian scale has the following degrees: 1 2 3 4 5 6 7.
Intervals: W-W-H-W-W-W-H.
Diatonic chords: CMaj7, Dm7, Em7, FMaj7, G7, Am7, Bm7b5.
| Degrees | Chord |
|---|---|
| I | CMaj7 |
| ii | Dm7 |
| iii | Em7 |
| IV | FMaj7 |
| V | G7 |
| vi | Am7 |
| vii° | Bm7b5 |
Degree-by-Degree Analysis
The I chord (CMaj7) is the tonic — the gravitational center of the key. The ii chord (Dm7) is the minor subdominant, commonly used to approach the V chord. The iii chord (Em7) functions as a substitute for the I or vi. The IV chord (FMaj7) is the subdominant — it adds motion and moderate tension. The V chord (G7) is the dominant — it creates the strongest tension that wants to resolve to the I. The vi chord (Am7) is the relative minor — it brings emotional color and depth. The vii° chord (Bm7b5) is the diminished — the most tense, rarely used alone, usually leading to the I.
This page focuses on the harmonic content — the chords built from each degree of the C ionian scale. For fretboard patterns and fingering guides, see the scale page.
Use the interactive harmonizer above to explore triads, seventh chords, and chord voicings for composing with the C ionian scale on guitar.
ionian is the 1st mode of the Major scale. View C Major scale
Related Scales
How to Use This Scale
Use over Maj7, Maj9, major triads. The default safe choice for any major-key context.