D#7 chord
D# dominant seventh
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>G
F#
G
G#
A
A#5
B
C
C#
D
D#
E
F
F#
G
A#
C
C
C#
D
D#1
E
F
F#
G
G#
A
A#
B
C
D#
E
D#
E
F
F#
G3
G#
A
A#
B
C
C#
D
D#
E
G
A
G#
A
A#
B
C
C#b7
D
D#
E
F
F#
G
G#
A
C#
3
5
7
10
The D#7 chord has the formula 1, 3, 5, b7 with notes D#, G, A#, C#
The dominant seventh chord is a mildly dissonant variation of the major chord that is used in many genres, like blues, funk, and rock. In blues, entire progressions can be composed of dominant seventh chords.