The Blues Scale.

The Blues scale is similar to the pentatonic scale, but we add a sharp 4th / flat 5th note. This note is not normally found in the minor scale.

For example; in the key of A minor, the notes of the blues scale are; A (1st), C (3rd), D (4th), D# / Eb (sharp 4th / flat 5th), E (5th), G (7th)

Here is the finger pattern for the Blues scale.

In this example we are playing the Blues scale in the key of F#, starting at the 2nd fret of the 6th (low E) string. The #4 / b5 note is marked in red.

Black Notes: These positions should be fretted with the first finger.
Blue Notes : position should be fretted with the second finger.
Green Notes : These positions should be fretted with the third finger.
White Notes : These positions should be fretted with the fourth finger.