piano chord
D♭5
D♭1A♭5
Root and fifth, no third at all — neither major nor minor, which is the point.
Written the other way round it is C♯5 — the same twelve keys on a piano, a different piece of notation.
What is true of it
D♭5 is D♭ and A♭ — 1 and 5 counted from D♭.