First, I do not think there is such a thing as a superchromatic, that term is misleading at best, especially because humans are already divided into three ranks of color-sensitivity.
Bichromatics are usually what we refer to as 'color blind.'
Trichomatics are normal.
Tetrachomatics -as the name suggests- see four color wavelengths. Oddly, no known male has ever been tetrachomatic, and it is thought only women can genetically become tetrachomatics.
This test does not really allow for tetrachromatics, and while they are rare, many do not even know that they have superior color-sensitivity and live out their lives believing they simply have different taste in colors, art, and photography.
It is possible that a truly superior tetrachomatic could take this test and be given a low score, because no one can truly predict how they see color. Much less how that color could be represented via a monitor.