The Most Unusual Eye Colors
From Wikipedia:
Green
Green eyes are the product of moderate amounts of melanin. They are most often found among people of North and Eastern European descent, and to a lesser extent, in Southern Europe, parts of Central and South Asia.. Green eyes are an uncommon eye color. In Iceland 88% of the population have green or blue eyes. Other ethnically Nordic countries like Sweden, Denmark, Germany, Norway, and (less) the Netherlands have a high percentage of green eyes. The Pashtuns are often called "Hurry Ankehian Wallay": the green-eyed people. Of all the normal colours of human eyes, it would appear that green eyes are the rarest. Studies have also concluded males perceive females with green eyes as appearing "intellectual".
Violet
The appearance of violet eyes is thought to occur from the mixing of red and blue reflections. Some albinos have eyes that appear violet.
A famous celebrity who is well known for having "violet" eyes is actress Elizabeth Taylor.
Red
'Red' eyes are also found in an extremely small (<0.001%) percentage of the world's population. This is believed to be a result of either large quantities of the normally scarce red areas in the eye, or a small leakage of blood into the iris; however the number of people on record as having red eyes apart from albinos, is believed not to exceed 20 (Recording of this condition started in 1964).