And why would they? The colour of our hair is determined by a pigment called melanin and it varies all over our bodies. So your pubic hair is normally darker than the hair of your head because of this and also because not a lot of people's downstairs are exposed to the sun for long periods of time either - or ever. But it isn't just the colour that will be different, you can also have a different texture and thickness of hair on your head in comparison to your pubic hair. But depending on length, you'll still be able to style both if you so desire.