Blues scale chords across all roots

A triad is a three-note chord. These use only notes from the scale. Some scale notes can be the root of several triads; others have none.

Root	1	♭3	4	♭5	5	♭7
C	C minor Cdim	E♭ major E♭ minor	No triad	No triad	No triad	No triad
C♯	C♯ minor C♯dim	E major E minor	No triad	No triad	No triad	No triad
D	D minor Ddim	F major F minor	No triad	No triad	No triad	No triad
E♭	E♭ minor E♭dim	G♭ major G♭ minor	No triad	No triad	No triad	No triad
E	E minor Edim	G major G minor	No triad	No triad	No triad	No triad
F	F minor Fdim	A♭ major A♭ minor	No triad	No triad	No triad	No triad
F♯	F♯ minor F♯dim	A major A minor	No triad	No triad	No triad	No triad
G	G minor Gdim	B♭ major B♭ minor	No triad	No triad	No triad	No triad
G♯	G♯ minor G♯dim	B major B minor	No triad	No triad	No triad	No triad
A	A minor Adim	C major C minor	No triad	No triad	No triad	No triad
B♭	B♭ minor B♭dim	D♭ major D♭ minor	No triad	No triad	No triad	No triad
B	B minor Bdim	D major D minor	No triad	No triad	No triad	No triad