The pills are colored the way they are because of the other drugs used to "cut" the E. Other drugs an be coke, crack, meth etc. The pills can range in color anywhere from green, blue, yellow, red, purple.. Typically, the Extacy your getting is cut with somthing to tweak the drug a bit (different highs)and, as much as people dont usually think about the business side of drug dealing, to keep costs down as well. "E" isn't pure MDMA, MDMA is what makes you lovely dovey and want to be affectionate and cuddle and hug. E is the mix of MDMA and other drugs. Example, a pill cut with meth will more likely make you (amungts other things) want to move and dance and stay very active and speedy, cut with somthing else, or more MDMA then anotehr drug, and you'll find that your more lazy and have more of a "body/ mind high", by that it will be more in your head then showing physically (dancing, "raving"). Eitehr way, no matter what color or what picture is stamped on the front, I say dont do it unless your ready to fend off the strongest addiction you will ever go through, everyday I have to tell myself I cant do E anymore, EVERY. SINGLE. DAY. Ive never had somthing get such a hold on me. It will be amazing, you will love it, it will be your new best friend, and then it will stab you in the back and try to kill you on your way down.