C Blues Scale
C blues scale is a jazz-blues staple, equally comfortable in keyboard improvisations and guitar solos. The F♯ blue note creates a tritone tension against the root C — the most dissonant possible interval, and thus the most expressive.
Notes in C Blues Scale
The C blues scale contains six notes: C — E♭ — F — F♯ — G — B♭. It is built by taking the C minor pentatonic and adding a single 'blue note' — the flattened 5th (F♯ (G♭)). This one addition transforms the scale from a clean pentatonic into the expressive, emotionally raw sound that defines the blues.
The Blue Note
The blue note (F♯ (G♭)) sits exactly between the 4th and 5th scale degrees — a half step in each direction. This unstable 'between-the-cracks' position is what gives it its expressive tension. Blues musicians 'worry' this note with bends, vibrato, and slides, never quite settling on it but using it as a bridge between more stable notes.
Famous Songs Using C Blues Scale
- "Red House" – Jimi Hendrix (C transposition)
- Classic Chicago blues in C
- "Born Under a Bad Sign" – Albert King
How to Practice C Blues Scale
Over a C7 chord, emphasise the F♯ blue note — it's a tritone away from C, creating maximum tension. Then resolve it to G (a half step up) or F (a half step down) for satisfying release.
Open the MusoKit scale explorer to visualise the C blues scale on piano and guitar and hear each note played in sequence.
Blues Scale vs Minor Pentatonic
The C blues scale is the C minor pentatonic plus one note. Remove the blue note (F♯ (G♭)) and you have the pentatonic; add it back and you have the blues scale. Most blues players switch between the two instinctively, treating the blue note as an expressive 'colour' rather than a structural element.
FAQs
What are the notes in the C blues scale?
The C blues scale contains: C — E♭ — F — F♯ — G — B♭. The six notes include the five notes of the C minor pentatonic plus the blue note F♯ (G♭).
What is the 'blue note' in the C blues scale?
The blue note is F♯ (G♭) — the flattened 5th degree. It creates a tense, expressive dissonance that gives the blues scale its signature sound when bent or slid into.
What is the difference between the C blues scale and C minor pentatonic?
The C blues scale adds the note F♯ (G♭) to the C minor pentatonic. This single addition gives the scale its characteristic bluesy tension and enables the expressive note-bending techniques central to blues guitar.
Can I use the blues scale in rock and jazz?
Absolutely. The blues scale is used in virtually every rock guitar solo and is a core scale in jazz improvisation. In jazz it is often mixed with the Dorian mode or bebop scale for added colour. In rock, it is used on its own or combined with the parent major scale for a 'major blues' sound.
What chords does the C blues scale work over?
The C blues scale works over C7, Cm, and all chords in a standard 12-bar blues in C (I7–IV7–V7). The blue note creates tension that resolves beautifully over the dominant 7th chords that anchor blues harmony.