A big trend at the moment is coloured eyeliner. Golds, silvers and all the colours of the rainbow!
You can rock this look many different ways, you can go for the very nude look, where the eyelids are almost bare an just put on the liner and mascara. You can do full on makeup with the coloured liner too, just keep the lips nude then. You can also do a light eyeshadow application on the eye, an do a bright colour liner underneath the eye. I have on blue eyeliner as I'm typing this!! :)