I have used the colors that are more easily associated with olives (greens, yellows, ochres, etc.), but if you want we can any other specific combo though I am not sure it will be better than these complimentary colors.
According to Logotournament rules, the winning designer is allowed to send only one design in two formats .jpg and .eps. However, If you like any of the others we can negotiate once the contest is completed. I can definitely send you a couple of color options if you are specific, which three you like best.