Personally, i think coloured emo hair looks just bad for most of the persons and also your hair can suffer some damage and it's not recomended. Colored hair is, generally, for those who work in a circus. There are some exceptions when it makes the persons look like an angel, but those are very rare, and after a while their hair will be damaged and it will look horrible. So don't colour your hair cause it won't look as cool as you think!
Coloured Emo Hair
Emo Hair Cut
Emo Hair would fit well most of the girls out there, but if you're a boy you risk being confused to a girl. Make sure, if you get some emo hair, that your emo hair won't make you look like an idiot. I see many people who got an emo haircut but they look horible. If emo hair doesn't fit you, don't insist and search for something else it will just make you look like a stupid poser!
Emo Hair
Here is guide of how you can get emo hair. This goes for girls and also for boys! Let your hair grow in the fron and side parts so they cover your face. In the back you can let it short and spike it up with gel! Some do that, some don't! If you have short hair, the first months are going to be a pain, because you won't be able to make your hair look "emo". As it grows, comb it towards an eye in the direction that you want. After 3 or 4 months, When the fringe reaches 3/4 of the way down your forehead, go to a hair dresser that looks professional, and get it thinned out and have it trimmed so that it will grow in the right shape. Either if you're a boy or girl, you'll need to straighten your hair, with either an iron or gel. If your hair is wavy, just use hairspray/gel to weigh it down. I suggest buying an hair straightening iron and use a a good moisturizing shampoo to prevent your hair from getting damaged. Tip: If you wash your hair too much, this can dry it out; that doesn't mean you don't have to wash it at all, bleah. If you consider dyeing your hair, dye it black. The other colors are not so cool and you'll look like a clown, in my opinion. After 3 or 4 months, your hair should look like you want. From that point, you should go to the hair stylist monthly for your hair to be thinned and stuff.