Mode 3 of Gb Major Scale

Bb Phrygian

Space plays and stops
Notes
BbCbDbEbFGbAb
Steps
H W W W H W
Intervals
m2 2 2 2 m2 2

The major scale and its modes are the most commonly used scales in western music.

Bb Phrygian is the 3rd mode of the Gb Major Scale: its notes, Gb Ab Bb Cb Db Eb F, played from Bb.

Chords it fits