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).
At first when babies are born, they don't open their eyes because they are still developing a little bit. So they are blind until a week or two after the baby is born. Then they see in full color, but it is like a confusing swirl of light and color because they have been in black since the beginning, and it is all new to them.