Flats appear in major keys only. These chords are diatonic in minor keys, but are chromatic in major keys. Therefore, major keys include diatonic functions in Blue and Green . Minor keys include diatonic functions in Yellow and Green . Purple cells indicate chromatic functions in major keys only.
All chromatic functions are dependent upon the chord resolving logically.
Orange cells indicate chromatic functions in minor keys only. All chromatic functions are dependent upon the chord resolving logically. Gray cells indicate chromatic functions in either major or minor keys. All chromatic functions are dependent upon the chord resolving logically. Therefore, major keys include chromatic functions in Purple and Gray .