Chords in F Mixolydian

F Mixolydian is built from the notes F, G, A, Bb, C, D and Eb. Its scale carries 2 flats. Harmonising that scale in thirds gives seven chords — 3 majors, 3 minors and 1 diminished — starting on F as the I. The chord on the fifth degree is Cm rather than a major V, so F Mixolydian has no leading tone and resolves by step and colour instead of by dominant pull — the sound that separates it from a plain F minor.

Beyond those seven, F Mixolydian commonly borrows Fm (i), Gdim (iiø), Ab (bIII), Bbm (iv) and Db (bVI) from the parallel minor — the mixture chords that give a progression somewhere unexpected to go.