Eye shadow most commonly. It is possible to get white kohl eyeliner, but the majority of the time I think it's just eyeshadow they use. White kohl eyeliner is often used to line the bottom-inner part of the eye, to make the eye look bigger, then black goes on the top-outer part of the lid- where the eyelashes are. Don't put black liner on the upper-inside part of the eye, its a common thing, but not an effective thing to do. I used to perform as a dancer, which is where I got onto white kohl liner. It's alright, but not a neccessity for daily stuff. Still, looks pretty good, like a finishing touch.