Hi Jeanne,
my dad is red/green colorblind. The defect is carried on the X-chromosome so it's much more likely to occur in men, as they only have one. Women whose fathers are colorblind, like me, are therefore carriers (defect on one X-chromosome and one X-chromosome with the gene for normal color vision from my mom who isn't a carrier). If my mom had been a carrier, I would have had a 50% chance of being colorblind. Or put another way, if I were to have children with a colorblind man, there is a 50% chance that my daughters would be colorblind. All our sons would be colorblind. It's much much rarer though in women for this reason
Has your husband been tested for color blindness?