When I was young I got the spectrum "wrong," because I ordered the colors in what looked to me like "light to dark". So I arranged them as yellow, orange, red, green, blue, purple. In first or second grade I learned that they really went red, orange, yellow, green, etc., and I could understand why, but it looked funny to me and sometimes I still unconsciously arrange them the other way.
http://www.livejournal.com/users/rinku/802760.html?thread=3140808#t3140808