About 1 out of 10 men are color-blind. Since it's a sex-linked genetic trait, you really can blame your female ancestors for this one. Nearly all of these have red-green color blindness. A few have blue-yellow blindness. That's why neither red nor yellow will protect you in hunting season. Achromotopsia (total color-blindness, seeing all colors as shades of gray) is very rare.

The legally-prescribed (in most states) blaze orange for hunting gear is not just orange! It is required to have enough reflectivity that it is obvious even to those with achromotopsia. It certainly is obvious to those with red-green and blue-yellow color blindness. Be sure that what you buy meets the legal requirements of states that require blaze orange for hunters. Just plain orange won't do the job.

Oregon is one of the few states that doesn't require blaze orange, although they recently instituted the requirement for juvenile hunters. Oregonians should check the labels of anything blaze orange before buying to be sure it meets the legal requirements of other states. An OSU (Oregon, not Ohio) Beavers cap may look bright orange, but it won't meet the reflectivity requirements. Besides, a UofO Ducks fan may get tempted to be trigger-happy!

EDIT, later: I just looked up the various state requirements for hunter orange and found that quite a few states "recommend" it rather than requiring it. In case you planned to hike in Rhode Island, all other recreationists (hikers, bikers, etc.) are also required to wear blaze orange on RI state managed lands during the various hunting seasons.