Key Of Bb Major...
 
Key of:    Bb Major
 
        7 Tones in key:              Bb, C, D, Eb, F, G, A       (I, ii, iii, IV, V, vi, vii)
        3 Primary Chords:         Bb, Eb, F                          (I, IV, V)
        3 Secondary Chords:     Cm, Dm, Gm                     (ii, iii, vi)
        Dominant 7th chord:      F7                                     (V7)
  Danman says..."Check out the chart"...Bb Major 
 

Scale Step	Root	3rd	5th	Chord Type
I	Bb	D	F	Major
II	C	Eb	G	Minor
III	D	F	A	Minor
IV	Eb	G	Bb	Major
V	F	A	C	Major
VI	G	Bb	D	Minor
VII	A	C	Eb	Diminished