At our Christmas brunch we where questioning what color we thought my new grandson's eyes would be as his mother's eyes are green and his dad's eyes are brown. So everyone said they thought his eyes would be brown as that is the dominant color. I brought up the fact that both of my parents had brown eyes and I have blue eyes and all my kids where teasing me saying there most have been some hanky panky going on as they thought that was not possible. I was very relieved to find out that it is definately possible. This is the simple explanation but if you want more details I have included a link.http://genetics.thetech.org/ask-a-geneticist/brown-eyed-parents-blue-eyed-kids
A lot of different colors can lurk behind someone’s brown eyes. This is true even if an eye color like blue hasn’t been seen in a family for generations. The blue eyes could still be hiding there, waiting for the right time to appear.
That right time is when both parents happen to have that particular color hiding out behind their brown. If only one parent has the right stuff to pass on blue eyes, odds are none of the kids will end up with blue eyes. But these kids could all still have blue hiding behind their brown like that parent.
This is one way that blue eyes can stay hidden for hundreds of years before making a sudden, dramatic appearance.
Only one parent in each generation has blue hidden behind his or her brown. Now, generation after generation, everyone will have brown eyes and some will have those hidden blues.
The blue eyes would keep getting passed down until finally one of these “carriers of blue eyes” had children with another parent that was a carrier too. Now their children would have a chance at blue eyes.
This is almost certainly how the two of you ended up with a child with blue eyes. You and your husband both have blue and at least one of you has green eyes hiding behind your brown.
By chance, you each passed a blue to one of your children and that child ended up with blue eyes. Well, that is almost how it worked…SO RELIEVED!!!!
source: By Dr. Barry Starr, Stanford University