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

The chords in the key of D♭ Major

D Flat Major Chord D♭
E Flat minor Chord E♭m
F minor Chord Fm
G Flat Major Chord G♭
A Flat Major Chord A♭
B Flat Minor Chord B♭m
C Diminished Chord Cdim

D♭ Major - E♭ minor - F minor - G♭ Major - A♭ Major - B♭ minor - C diminished (C°).

      Db    Ebm   Fm    Gb    Ab    Bbm   Cdim  
      I     ii    iii   IV    V     vi    vii   

The chord formula for any Major key is
Major - minor - minor - Major - Major - minor - diminished

A common way to number these chords is by Roman numerals
I - ii - iii - IV - V - vi - vii

(Major chords are usually capitalized, minor and diminished chords are lower case)