Where to find colorful non prescription eye contact lens?

Okay, so I always wanted my eyes to be a different color than everyone else's. I don't always want to have my boring brown eyes. So I wanted to know if anyone knew where to go to get them, and to learn how to put them on... I want to get like purple or yellow. Something exotic and not like blue or green, because alot of people have tose color eyes. So someone PLEASE help me :3