Question 132866
can he sue? Sure. But he may well lose.

Color blindness is a recessive trait. The only way to have a child born that way is if both parent carry the gene. Assuming neither parent is color blind, both could still be carrying the gene and not know it.

So, if the father is tested and does not have the gene at all, he has a case. But, he may well have the gene as a recessive trait. In that case, he is 'half of the reason'.