Chord Colors

C♯ 7b5 Diminished scale
PianoGuitar

About the C sharp 7b5 Diminished scale

C sharp 7b5 Diminished is used for jazz solos over dominant chords with a flat fifth. Think of it as a dominant scale with a flat fifth and a chromatic seventh.

Its notes are C♯, D♯, E♯, F♯, G, A, B, and B♯. The formula is W W H H W W H H.

Also called Messiaen Mode 6.

The black keys C♯, D♯, and F♯ belong to C♯ 7b5 Diminished. The key lines up four white keys back to back.

Notes and intervals

1C#C♯Root
2D#D♯Major 2nd
3E#E♯Major 3rd
4F#F♯Perfect 4th
5GGDiminished 5th
6AAMinor 6th
7BBMinor 7th
8B#B♯Major 7th
StepsW W H H W W H H
Semitones2-2-1-1-2-2-1-1
Degrees1 2 3 4 ♭5 ♭6 ♭7 7

Shapes

Chromatic

CC♯D♭DD♯E♭EFF♯G♭GG♯A♭AA♯B♭B

Circle of Fifths

CGDAEBF♯G♭C♯D♭G♯A♭D♯E♭A♯B♭F

Related scales

7b5 Diminished in other keys

C 7b5 Diminished scaleD 7b5 Diminished scaleD sharp 7b5 Diminished scaleE 7b5 Diminished scaleF 7b5 Diminished scaleF sharp 7b5 Diminished scaleG 7b5 Diminished scaleG sharp 7b5 Diminished scaleA 7b5 Diminished scaleA sharp 7b5 Diminished scaleB 7b5 Diminished scale

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Db 7b5 Diminished scale on piano shown as colored note dots
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