C# 6
The C# 6 chord consists of the C# (Perfect unison), F (Major third), G# (Perfect fifth) and A# (Major sixth) notes.

How to play the C# 6 chord
- Find C# (Root) on the piano keyboard
- Add F (Major third) — 4 semitones above C#
- Add G# (Perfect fifth) — 7 semitones above C#
- Add A# (Major sixth) — 9 semitones above C#
- Press all 4 notes simultaneously to sound the C# 6 chord