Key
Chords in C Lydian
C Lydian is built from the notes C, D, E, F#, G, A and B. Its scale carries 1 sharp. Harmonising that scale in thirds gives seven chords — 3 majors, 3 minors and 1 diminished — starting on C as the I. The chord on the fifth degree is G, a major V, so C Lydian has the leading tone that makes a G-to-C cadence sound final.
Beyond those seven, C Lydian commonly borrows Cm (i), Ddim (iiø), Eb (bIII), Fm (iv) and Gm (v) from the parallel minor — the mixture chords that give a progression somewhere unexpected to go.
The seven chords
Extended to four notes each, the same seven degrees give Cmaj7, D7, Em7, F#m7b5, Gmaj7, Am7, Bm7.
Borrowed chords
Play C Lydian with no capo — its own shapes are already the easiest ones.
All eight capo positions for C Lydian →