You see less than 20 color nuances: you are a dichromats, like dogs, which means you have 2 types of cones only. You are likely to wear black, beige, and blue. 25% of the population is dichromat.
You see between 20 and 32 color nuances: you are a trichromat, you have 3 types of cones (in the purple/blue, green and red area). You enjoy different colors as you can appreciate them. 50% of the population is trichromat.
You see between 33 and 39 colors: you are a tetrachromat, like bees, and have 4 types of cones (in the purple/blue, green, red plus yellow area). You are irritated by yellow, so this color will be nowhere to be found in your wardrobe. 25% of the population is tetrachromat.
You see more than 39 color nuances: come on, you are making up things! there are only 39 different colors in the test and probably only 35 are properly translated by your computer screen anyway :)
It is highly probable that people who have an additional 4th cone do not get tricked by blue/black or white/gold dresses, no matter the background light ;)
Sources: Diana Derval, The Right Sensory Mix: Targeting Consumer Product Development Scientifically, Springer 2010
On the Crystal Skull page I describe my experiences with viewing colors outside the normal spectrum in these words. " Colors are vivid. Ultra-green, infra-yellow and hyper-violet are the only words that can express my experience of the color spectrum experienced with the crystals during these sessions" .
The above article is of interest on a personal basis because Diana Derval demonstrates the science behind viewing nuances of color.
By the way, I scored 37 the first time and 36 a few hours later. I guess I am
a tetachromat which makes sense because I made my living as a beekeeper for a few years in my youth.