piano scale
C♯ blues
C♯1E♭3F♯4G♭5G♯5B♭7
Minor pentatonic with one note squeezed in between the fourth and the fifth. It is written as a flattened fifth, so the fifth letter carries both of them and the fourth keeps its own.
The same sounds spelled from the other side are D♭ blues.
Written out
Every accidental is written in, rather than left to a key signature, so the letters can be read one at a time.
The step pattern
C♯W+HEWF♯HGHG♯W+HBWC♯
What is true of it
C♯ blues is C♯, E, F♯, G, G♯ and B, and back to C♯.
Its steps are W+H – W – H – H – W+H – W, where W is a whole step and H a half.
Chords made only of these notes
Found by testing every chord in the catalogue against these 6 sounds, not chosen.
Other scales on C♯
C♯ major pentatonicpentatonicC♯ minor pentatonicpentatonicC♯ major bluespentatonicC♯ majormajorC♯ natural minorminorC♯ harmonic minorminor
C bluesD bluesD♯ bluesE♭ bluesE bluesF bluesF♯ bluesG♭ bluesall 374