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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).
Because of how color blindness works, only your sons that got the gene would end up color blind (assuming your partner isnât color blind). That last point in parentheses is an important one. Men always pass the color blind gene to their daughters but the daughters end up color blind only under the right circumstances. For example, if your uncle married a woman who carried the color blind gene, then each of their sons and daughters would have a 50% chance of being color blind. In this case, it would look like the man, your uncle, passed his colorblindness down to his kids.