Guitar Chords in the Key of A Flat (A♭) Major

The chord formula for any Major key is Major, minor, minor, Major, Major, minor, diminished.

The chords in the key of A flat (A♭) Major are A♭ Major, B♭ minor, C minor, D♭ Major, E♭ Major, F minor, and G diminished.

A common way to number these chords is by Roman numerals: I, ii, iii, IV, V, vi, vii. Numerals that represent a major chord are usually capitalized, and minor and diminished chords are lower case.