What's the diffrence between a red and green motherboard ?

The only difference is that; one is red and one is green. Mine is black, my last one was blue.

EDIT
one other thought, green boards are typically found in pre-built systems that often lack some of the more interesting bios options. I've seen very few green boards that had overclocking options, so I guess that would make red better, but a new green board is probably way better than a 5 year old red one. So again, it's really just what color they decided to make it.
 
I have a green motherboard and i have just bought a red graphics card from ebay that hasent arived yet, does it matter? I got ddr2 which is what i need.

Thanks