With 4 green hangers, 1 less blue hanger than there are green hangers is 4-1=<<4-1=3>>3 blue hangers.
With 3 blue hangers, 1 less yellow hanger less than there are blue hangers is 3-1=<<3-1=2>>2 yellow hangers.
With 7 pink hangers, the total number of colored hangers in Fifi's closet is 7+4+3+2=<<7+4+3+2=16>>16 hangers.
#### 16