In short, yes—but not as much as you think it does. Fading your clothes depends on their material, their color, and how long they're left in the sun.  So, to protect your clothes, try flipping them inside out to prevent the outer layer from fading gradually. Another tip is to shield your dark and vibrantly pigmented clothes with your whites or brighter colors. Finally, don't leave your clothes out in the sun for too long.