F7 chord
F dominant seventh
<
1 / 1
>
3
5
7
10
The F7 chord has the formula 1, 3, 5, b7 with notes F, A, C, D#
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.