Stark contrast makes me happy. In order to make something stand out, what do you do? You contrast it next to something that compliments or contrasts it. You want an orange sun? Stick it in a saturated blue sky. Want a cheekbone that stands out? Shadow it with contrast! Contrast is one of my favorite tools to use in art because things just look different next to different things, and exploiting those little benefits are what make art so good. Love using it for fashion illustration because I can exaggerate it so much. Love it!