You probably see a 3 in this image, but approximately 3000 to 4000 MacRumors members do not. They are color blind. About 5% to 8% of men/boys and about 0.5% to 1% of women/girls are color blind, which means they have a deficiency in their perception of color. The rate of occurrence varies depending on ethnic background and ancestry, differing from country to country. I am color blind. I've been red-green color blind since birth. Technically, I have congenital dichromatic protanopia. Translation: I can't see red. I see no numbers in the color circle above. As a result, I usually can't distinguish blue from purple, because they differ by the presence of red. Dark red and dark brown look the same. Some shades of green look brown to me while other shades of green look orange. To me, pink and gray are practically identical. If you analyze the shades that confuse me, it's usually two colors that have similar intensities but differing amounts of red. I've always claimed that this is why I'm usually in a good mood. I'm very slow to anger because you won't make me "see red". My grandfather was born color blind. My mom was born a color blindness carrier. My brother and I, who each had a 50% chance to have normal vision, both lost the coin toss and were born color blind. I'm not embarrassed to talk about being color blind. It's an almost-harmless affliction. It doesn't hurt, it's unlikely to ever be life-threatening, the typical problems are simple to solve, and anybody I ask for help with colors is glad to help. I like to laugh at my own color mistakes, such as mismatching my socks or talking about my "blue duffel bag" that turned out to be purple. Go ahead and ask me questions about being color blind, because I'm curious what people would like to know. And anybody else who is color blind (or has a color blind friend or relative) is welcome to speak up too. I maintain a List of Color Blind MacRumors Members for forum members who have said that they or a family member are color blind.