Wedding Colors

My wedding colors are black and ivory. I chose ivory because my wedding dress color is "diamond". Should I use ivory table cloths at the reception with black accents? The caterers will supply white linen table cloths, but I`m not sure I should use white since my bridesmaids dresses, invitations and favors are all black/ivory. What about guest table centerpieces? I am on a budget and I am really not that big on flowers. Not sure where I should incorporate these colors, anyone have ideas?