The theme is black, white and I need to choose between red, gold, pastel green and bridemaids dresses, flowers

if you do white, red, and green you are going to look like christmas. i think if the theme is black and white - put your bridesmaids in black. then accent with only ONE color so you don't get to tacky. i like red. put red bows and the chairs, red center peices on the tables and have everyone's flowers be red and white with black accents (bows and ribbons). you could have the groomsmen in black tuxes with a red vest to accent them.