eye color isn't only inherited from your parents eye color. they could have recessive blue eye genes and have dominant brown eye alleles, therefore there is a chance you get blue eyes though both of your parents have brown. there is a fairly low chance, but it is still possible. let's say your mom has blue eyes and your dad has brown eyes, there is more of a chance that you get brown eyes, whereas if your dad also had blue eyes, you would have a 50% chance to get blue eyes since blue eyes are recessive. hopefully this helped ♡