colour IQ
How good is your perception of colour? Can you easily discriminate between and order hues? Test yourself here - http://www.xrite.com/custom_page.aspx?PageID=77.
The lower your score, the better, with 0 being a perfect eye for hues and shades, and around 1000 being the default (unordered) score. My best score was 12, with a few errors in the purple-blue spectrum.