This supermarket employee is learning that some bosses care way more about appearances than others. It really depends on your career path: if you're a lawyer, there's no way you can show up to work rocking green hair and lip piercings. But there are plenty of job opportunities where HR either doesn't care or doesn't have the power to instruct employees about that kind of thing. When you rock an unnatural hair color, people usually have one of three reactions. They'll either tell you they like i…