I did mine with charm squares in the corners. I used one fabric for all the centers, and scrappy creams for the other squares.
Charm/Cream/Charm
Cream/Dark/Cream
Charm/Cream/Charm
I think I used three different charm packs, picking out the light ones and using them with the creams from my stash.
I have seen some done just all scrappy, but IMHO, I think it looks better with a little bit of consistancy.