What are blue chords?

Post date: 2023-03-24 19:07:00 Category: How to play chords
There is no specific set of "blue chords" in music theory. However, in the context of blues music, certain chord progressions and chord structures are commonly used, which are sometimes referred to as "blues chords."

One of the most common blues chord progressions is the 12-bar blues, which typically uses three chords: the I (one) chord, the IV (four) chord, and the V (five) chord. In the key of A, for example, the I, IV, and V chords would be A7, D7, and E7, respectively. The use of dominant seventh chords (such as A7, D7, and E7) is a characteristic feature of blues music.

Another common blues chord structure is the "quick change" or "quick four" progression, where the IV chord is played earlier in the progression than in the 12-bar blues. For example, in the key of C, the quick change progression might use the chords C7, F7, and G7 in the first four bars, before returning to the I chord (C7) for bars five through eight.

Other elements of blues harmony include the use of blue notes (flatted third, fifth, and seventh notes), passing chords, and variations on standard chord progressions. These elements contribute to the distinctive sound and feel of blues music, which often emphasizes emotional expression and improvisation.

Here are some famous blues songs that have become classics:

  1. "The Thrill Is Gone" by B.B. King
  2. "Sweet Home Chicago" by Robert Johnson, Eric Clapton, and many others

These songs represent different styles and eras of blues music, from the Delta blues of Robert Johnson to the electric blues of B.B. King and the soulful blues of Etta James. They are known for their expressive vocals, dynamic guitar playing, and powerful rhythms, and have influenced countless musicians across different genres of music.