Blues chord progressions

The 12-bar blues is the most important chord progression in American music. It is the shared language that rock, jazz, R&B, soul, and country all learned before developing their own dialects. The structure is simple: 12 bars divided into three four-bar phrases, using the I, IV, and V chords. In E major that means E7, A7, and B7. In C major: C7, F7, G7. The dominant seventh chord on every degree — including the I chord, which is normally major — is what gives the blues its characteristic sound. That I7 chord creates constant tension that never fully resolves.

What makes the blues harmonically sophisticated is the "quick change" and the turnaround. The quick change jumps to the IV chord in bar 2 instead of staying on the I chord for four bars — this gives the progression more forward momentum. The turnaround is the last two bars: instead of ending on the I chord, the progression moves I–V (or I–V7) to set up the repeat. A great blues turnaround is a complete statement of tension and release in two bars.

The minor blues replaces the major seventh chords with a natural minor framework. Where the major blues uses I7–IV7–V7, the minor blues uses im–IVm–Vm (or im–iv–v with the lowered VII). The emotional register drops dramatically — minor blues has the ache without the swagger. B.B. King's "The Thrill is Gone" and Clapton's "Still Got the Blues" use this vocabulary. The progressions below cover major blues, minor blues, slow blues, and variations. Play the 12-bar at 120 BPM and then at 70 BPM to hear how the genre transforms.