Db major 13th chord
Dbmaj13 chord for piano with keyboard diagram.
Explanation: The D flat major thirteenth is a six-note chord (the 11th, Gb in the case of Dbmaj13, is normally excluded). For practical reasons the chord is normally played with omitted notes and/or inverted. It is often abbreviated as Dbmaj13 (not to be confused with Db13).
Theory: The Db major thirteenth chord is constructed by extending the major eleventh chord with a major thirteenth note.
Notes: Db - F - Ab - C - Eb - Bb