The Stroop Effect
Read each color out loud not the word
Your brain has two different regions. One to realize language. And the other to recognise colors. So when you see a word that represents a color but that word is a different color then represented. So your brain becomes confused whether to send the word or the color.
DiSpezio, Michael A. Optical Illusion Magic: Visual Tricks & Amusements. New York: Sterling Pub., 1999. Print.
"Stroop Effect." Mercercognitivepsychology [licensed for Non-commercial Use Only] /. N.p., n.d. Web. 17 Mar. 2015.