In the key of F Major, the family chords are built from the F Major scale, which consists of the notes F, G, A, Bb, C, D, and E. The key signature has one flat (Bb), giving it a warm, mellow sound. These chords are created by stacking thirds (every other note) starting from each scale degree, resulting in the diatonic chords natural to F Major.
I - F Major: F, A, C
The tonic, bright and grounded, the home chord.
ii - G minor: G, Bb, D
A soft, slightly somber minor chord.
iii - A minor: A, C, E
Another minor chord, adding a touch of depth.
IV - Bb Major: Bb, D, F
The subdominant, smooth and flowing.
V - C Major: C, E, G
The dominant, strong and resolving back to F.
vi - D minor: D, F, A
The relative minor, introspective and gentle.
vii° - E diminished: E, G, Bb
A tense, diminished chord, great for leading somewhere.