The white slots are PCI slots as shown at the link below. You would have to get a PCI video card.
PCI Video Cards link
I have a motherboard that does not have a slot for the video card. If I remember correctly I think that it is usually brown. On my mobo there are only three white expansion slots. Is there a way to add on the video card or can I buy something to put in one of the three PCI slots? Any help will be greatly appreciated, thanks for you time.