Db Power Chord (5) (Db5)
Also written as C# Power Chord (5) (C# and Db are the same key).
1+5
Notes in Db Power Chord (5)
C# (root)G#
Inversions
Same notes as Db Power Chord (5), with a different chord tone as the lowest note. Useful for smoother movement between chords instead of jumping around the keyboard.
Root position
C# in the bass
1st inversion
G# in the bass (Db5/G#)
Press C# and G# together on the keyboard and you're playing Db Power Chord (5).
Just a root and a fifth, no third at all. That makes it neither major nor minor, which is why rock guitar and simple piano left-hand parts lean on it so much. It sounds strong and neutral, and it leaves room for a singer or another instrument to decide the mood.