Key Of C# (Db) natural minor...
 
Key of:    C# (Db) natural minor  (minor)

        7 Tones in key:               C#, D#, E, F#, G#, A, B      (i, iidim, IIII, iv, iv, VI, VII)
        3 Primary Chords:          C#m, F#m, G#m                  (i, iv, iv)
        3 Secondary Chords:      E, A, B                                (III, VI,VII)
        Dominant 7th Chord:      B7                                        (V7)
  Danman says..."Check out the chart"...C# (Db) natural minor
 
  Scale Step      Root     3rd    5th   Chord Type
         I         C#      E     G#   Minor
        II        D#      F#     A   Diminished
        III        E      G#     B   Major
        IV       F#      A     C#   Minor
        V       G#      B     D#   Minor
       VI       A      C#     E   Major
       VII       B      D#     F#   Major