This is just a random test I found while watching Jake Roper's channel (Vsauce 3). Basically, how it works is, there are some colored boxes that are all the same color except for one, and you have to click on the one that's different from the rest of them (and you only have a minute to see how far you can get). This gets more difficult the farther you get, and more boxes are added. I personally got a score of 25 on this test, which I thought was pretty good, considering my vision is absolute crap. Anyway, if you want to try it yourself, here's a link for it: Color perception test.
Didn't nerd cubed play something almost EXACLTY the same as this, but a game? XD EDIT: *Cough* *Spits out link*
I am using an iPad and got 16. But, an iPad in bad lighting isn't the best situation for doing this..
I found that the pink/blue/yellow/green/red ones were easiest for me, then it got tough when it was browns and darker reds and purples.