This is one of the many questions I receive which cannot properly be answered at this time:
Is there a connection between being Rh negative and also be color blind or being a carrier of color blindness?
The best I can do at this time is bring the subject back up and wait for your feedback.
Does color blindness run in your family and why do some think there could be a connection between color blindness and being Rh negative?
At this time, I am not aware of any color blindness in any member of my family. And that includes well over a hundred members. I live in a small time with many cousins who have negative blood and I am not aware of them ever mentioning being color blind either.