I was introduced to an interesting and important color test that any photographer working with color imagery should take.
If you are serious about printing color images yourself, you know you need to calibrate your monitor and profile your images for the paper you use. You can now check your skills at judging color by doing a short but interesting “test” found at: www.xrite.com/custom_page.aspx?PageID=77
I should not prejudice you, but I got 30 on the test. You should take the test to see how good a judge of color you are (and to see if my score of 30 is a good or bad score.)