We all know women define colour in more shades than men do but is that because we see more colour or because we learned to associate colour shades with food names? It's not pink, it's salmon! And when I say salmon, I mean salmon mousse.
Statistically women do have better colour acuity. 1/12 men have some form of color vision deficiency while 1/255 women have some deficiency.
In this test, a series of subtly varied color swatches ranging between two hues is presented out of order, and it's up to you to rearrange the swatches so that the gradient between the two colors is correct.