Brown eyes are most common with over 55% of the world pop having them. Around 8% of world pop has blue eyes. Between 5-8% of the world pop has hazel eyes. Only 1-2% of the world pop has green eyes. Green eyes are also more common in women than men.
While green is dominant over blue there are very specific things that have to happen for green to occur. And without getting to technical green eyes are not really green but have a yellow or amber stoma that make them appear green.
Oddly enough celebrity's with green eyes are more common than in the general public. An example of how humanity values rarity???
Red hair only occurs in 1-2% of the world pop as well. With the highest occurrence in Ireland at 10-30% and Scotland at 10-25%.
All articles I read that went into great detail about genetics, chromosomes and such, and many stated that both red hair and green eyes have Celtic and Germanic ties. Yet the combination together is extremely rare.
Here is a great article on red hair. It is very technical but very interesting. Even the comments are good.
http://www.eupedia.com/genetics/origins_of_red_hair.shtml
Here is an article about green eyes, technical but not overly so.
http://www.eyedoctorguide.com/Eye-Color/green-eyes-eye-color.html
I am the only person in my family with greens. All others are blue except my dad and a great grandfather that are/were brown. I am also blonde but carry the red gene. My hubby is blue/brown but also carries the red gene. I have a red grandma, his mom is red. Our daughter has blue eyes and is considered a strawberry blonde. However she has only copper highlights on a dark blonde color so her hair looks like the eye color amber but changes greatly under different lighting or sun/cloudy days. I was hoping I would pass on my greens but 4 kiddos (3 with different blue eyed dad) all with blue eyes.
Oh well, maybe a green eyed grandchild someday. Aren't genetics fun!