I am partially colorblind, but it is to contrasts and shades of colors....I can see primary colors, but cannot differentiate between shades of colors. I could not see any of the numbers in the test that a non-colorblind person could see. I never really knew I was partially color blind until I took a similar test about 20 years ago. However, there are certain colors where my perception of the color is more acute than "non-color blind" folks. For example, I can tell that certain colors are a nuanced shade of brown or blue where others cannot. It's funny, because they will say "oh, what do you know ...you are color blind"...and then the item will have the color written on it somewhere proving I'm right.....or the sales person will say I'm right, and they will look at me like I'm an idiot savant....well, mostly just like I'm an idiot....