I'm not colour blind, but I am color blind.
Joking aside, world-wide, color-blindness effects about 8% of the male population; about 0.5% of the female population. I can read three of the plates in the Ishihara test, and it has never bothered my hunting at all.
People that aren't color "blind" don't really understand that the "blindness" doesn't mean that you can't SEE colors, rather vastly more often than not the problem is DIFFERENTIATING specific colors. I have a very difficult time differentiating green and blues. The more "pastel" they are, the more problem I have.
I never knew I was "color-blind" until I took some vision tests as 'preparation' for electronics training in the US Navy. They gave me the Ishihara test which I failed miserably. Having ALREADY been through ALL of the electronics schooling the Navy had, (the Navy never lets reality interfere with 'procedure'), they got a little 'concerned' that I failed a test that was supposed to PREVENT one from being eligible for electronics schooling. So, in perfect bureaucratic form, they gave me another test. This one was essentially a "traffic light" - three discs oriented vertically the colors of which were red, green, and yellow. The order of the colors was changed and the person being tested had to note the order of the colors. I passed with 'flying colors'. (Couldn't resist.

) They were happy. I was happy. The Navy was happy. Everybody was happy. The "issue" in the context of electronics is the color coding of certain components - mostly resistors. That never posed a problem for me, and like I said, I think I can only see two or three of the Ishihara plates.
Here's my point: I'm 65 years old. I didn't even know I was "color-blind" until the Navy told me I was. I SEE colors just fine. I just have difficulty distinguishing between a couple of them when they are "pastel" shaded. My "blindness" didn't effect my performance with electronics schooling or practice. It has never effected my hunting.
Paul