Blues scale

The blues scale is a hexatonic scale with minor pentatonic scale. But because blues notes (or blue notes) have a different form, there can be no one blues scale. As named in contemporary jazz theory, its use is based on the key and not the chord, unlike some chords in jazz.
The semitone differences for a blues scale are 3-2-1-1-3-2 for instance- C-Eb-F-F#-G-Bb-C