Green, for effective contrast!
I have a purple penny board and so does my cousin, she wears a blue, but she like bright colours. I'm not really a bright colour chick but I do t just wear black. But with my penny board I wear black vans, rolled up legging to my ankles, a white belly top or white and black t shirt tucked in and bagged. And my hair down to the side. But it depends on your style