Do you have a dominant eye color or is your eye color recessive? All of your traits that you have are either dominant or they are recessive. Dominant means that the trait will always show up no matter what. Recessive genes cannot show with a dominant gene present.
Recessive means that the trait will only show if there is no dominant gene there. If your hair is blonde then your trait for hair is recessive. You would have no genes for dark hair. Since you have two genes for every trait you have, one from your father and one from you mother, you would have gotten two genes for light hair if you were a blonde. You could not have been blonde if you had one gene for dark hair and one for light hair. This is because dark is dominant.