A property professional with nearly 20 years experience of estate agency in Suffolk and North Essex. During that time I have carried out market appraisals on over 5000 residential properties and have helped over 1500 people successfully sell their home.
Therefore, a son from a color-blind mother (who receives the trait from his mother on the X-chromosome) will always be color-blind, regardless of the state of the father (who can only give his son a Y-chromosome).
By 12 months, most babies will have their permanent eye color, although Dr. Fredrick says that some children's eye color may still change up until age 6, though this occurrence is rare and the change won't happen overnight.