The C♯ Major 6 chord is a four-note chord made up of C♯, E♯, G♯, and A♯.
Construction
| Note | Interval | Degree |
|---|---|---|
| C♯ | Root | 1 |
| E♯ | Major 3rd | 3 |
| G♯ | Perfect 5th | 5 |
| A♯ | Major 6th | 6 |
C♯ Major 6 Inversions



| Position | Notes |
|---|---|
| Root Position | C♯ – E♯ – G♯ – A♯ |
| 1st Inversion | F – G♯ – A♯ – C♯ |
| 2nd Inversion | G♯ – A♯ – C♯ – F |
| 3rd Inversion | A♯ – C♯ – F – G♯ |
Key Signature
A chord has no key signature of its own, but the C♯ Major 6 is the tonic (I) chord of C# Major, whose key signature has 7 sharps (F♯, C♯, G♯, D♯, A♯, E♯, B♯).
Order of sharps
Sharps are added to a key signature in a fixed order. Each new sharp key adds the next sharp on the list.
Mnemonic: Father Charles Goes Down And Ends Battle
Chords in the Key of C♯ Major
These are the triads built on each degree of the C♯ major scale:
Same Notes, Other Names
The notes C♯ – E♯ – G♯ – A♯ aren’t exclusive to this chord. Depending on which note is the bass and how the chord functions, the same pitches also spell: