It’s a 2-tier round naked cake 6” and 9”, with a black and white striped cake board, and some bright fuschia flowers.

i was thinking about putting a black fondant ribbon around the base of the cake with a small black fondant bow-would that work with the rustic look of the cake or should I just leave it alone?

Oh I like the idea of the ribbon (on the thin side) w/a bow :)

Thank you! I am going with it 

I agree!  I think a thin, black bow would be very classy.