For my design students, you may really get a kick out of this! X-Rite, one of the companies that make great Monitor and Printer color calibration tools, has come up with this test to determine your color acuity.
As it turns out, our ability to distinguish small color variations becomes less acute with age (and other factors)
I tried this about a year ago, and found out that, thankfully, my color acuity was much younger than I am!
Even if you’re not a design student, but you’re into color, this test is really interesting and you may find it fun.