D♭ Major 7th :: D♭ F A♭ C

B
F♯
D
A
7
D♭
5
3
7
D♭
3
7
5
D♭
3
5
7
3
D♭
5
⬤ ⬤
⬤ ⬤
C Major 6th :: C E G A

B
F♯
D
A
6
C
5
3
6
C
3
5
C
6
3
5
6
3
C
5
⬤ ⬤
6
⬤ ⬤