It depends.. What color eyes do both your parents have?
Since he has blue eyes that means that he has 2 genes for blue eyes (everyone has two genes for each trait, one from each parent... Some are dominant and some are recessive. Blue is recessive). If one of your parents has blue eyes, then there is a chance that you have 1 gene for blue eyes and 1 gene for greenish brown (hazel) eyes, hazel being dominant over blue and hence your eyes are expressed as hazel. But if your parents have green eyes or brown eyes or hazel eyes, then it's most likely your child will have green/brown eyes.
Unless there is a hidden 'red head' gene or 'blonde gene (both are recessive to brown hair which is dominant) which hasn't shown up since a grand parent or great grandparent or simply just a parent, I'd say your child will have dark hair.
Since he has blue eyes that means that he has 2 genes for blue eyes (everyone has two genes for each trait, one from each parent... Some are dominant and some are recessive. Blue is recessive). If one of your parents has blue eyes, then there is a chance that you have 1 gene for blue eyes and 1 gene for greenish brown (hazel) eyes, hazel being dominant over blue and hence your eyes are expressed as hazel. But if your parents have green eyes or brown eyes or hazel eyes, then it's most likely your child will have green/brown eyes.
Unless there is a hidden 'red head' gene or 'blonde gene (both are recessive to brown hair which is dominant) which hasn't shown up since a grand parent or great grandparent or simply just a parent, I'd say your child will have dark hair.