My Mother and Father have dark brown eyes I have four Brothers three have brown eyes and the other like me have Blue eyes I thought that if both parents have brown eyes they can have both brown and blue, but if the parents both have blue eyes they can't have a blue eyed child.
you can both have brown eyes and have babies with blue as brown is the dominant gene so if you have brown eyes your eye genes can be brown brown or brown blue, so if two people have brown eyes and are both brown/blue with their genes they'll only pass one to the baby so if they pass the blue form each then their baby will be blue eyed. To have blue eyes your genes are blue/blue. It is very rare, more down to genetic 'abnormailty' like the woman who was white with a white husband and had twins one black(is that politically correct?) and one white, but it can happen that two blues can have a brown eyed but in majority if your baby has brown eyes and you both have blue alarm bells could be going off - my ohs uncle recently found out that his adult daughter was not his own and only through talking about how they looked it eye colour came up, he and wife blue, daughter brown!