NOTE: your ability to score well in this test is very much dependent on your monitor. I first did this test on a laptop, didn't score so well, then did it at my desktop (with a better screen) and the score was similarly much better.
So this isn't only a test of your ability to perceive colour but also of your monitor's ability to display colour.
In my case the monitor doesn't make much difference at all. I've known for almost sixty years that my own color vision is of the variety that is commonly referred to as "red-green color blindness." The Ishihara color vision tests verify the difference between "normal" and "deficient" color vision very simply and quickly. It turns out that those of us with my kind of color vision tend to make distinctions first in terms of brightness (contrast) and only secondarily in terms of hue.
I tried the X-Rite test just out of curiosity, using a pretty good calibrated monitor, and had a very hard time sorting out the patches, ending up with a humongous score.
That's why I do most of my work in B&W, only using color in abstract images where the accuracy of the color doesn't matter.