This animation was taken from:

 

http://www.animationfactory.com/animations/people_m_z/scientist/1391df/

Introduction

Roses are red violets are blue the grass is green … What? You can’t see it? If you can’t, the chances are that you, yes you are one out of 250000000 (too long lets just say 250 million) color blind people on our planet! Or, one out of 15000000 (again, 15 million) color blind people in north America!  If you just need more information, no problem, just click on the hyperlink on your left that says “What is it”, and you are guaranteed more information.