It's complete bogus, in the example I was talking about there was flower in addition to tool and color, though I severly doubt it makes it any more credible.
Color I could see being relevant (If I REHEHEHEEEEAAAAAALLYYYYYYY wanted to believe), but with Flower and Tool you'd probably see a group of people sticking completly out of the statistics, for example gardners or constructionworkers. Alternatively, the day you take the test might influence it too, if it's been snowing all day and you haven't gone out, I'd say chances are pretty big that you're gonna say white (or possibly yellow....).