Someone told me of an experiment in which they made Lifesavers which had the colors mix-matched with the flavors. (For example, green was orange instead of lime, or red was lemon instead of . . . uh, cherry?)
And people tested them (without knowing the "flavors"), and thought they were new flavors. They couldn't identify them as mis-matched colors-flavors.
I can't find that experiment anywhere. But I thought that would be an interesting experiment to do with homemade rock candy.
Rock candy recipe = http://candy.about.com/od/hardcandyr...rock_candy.htm