What colour eyes?
The genetics of eye colour is complicated – a number of different genes vary and interact to produce the different colours. These genes affect the amount of pigment in the iris of your eyes, but some have stronger effects than others. Just one gene controls most of the blue-brown colour spectrum. Two brown-eyed parents could still have blue-eyed children. In the parents the effect of the blue-eye gene is masked by the brown-eye gene, but they may still pass on a blue-eye gene to their children. A child who inherits no brown-eye genes but gets two blue-eye genes will have blue eyes.