One of the best things about makeup — aside from the fact that it can make us look beautiful even on our worst days — is the rainbow-variety of colors it comes in. From blue shadows and green liners to baby-pink blushes and fire-red lipsticks, the combinations are beautiful and nearly endless. But for the occasional refreshing change, keeping it simple and natural can be the best option. Unfortunately, it’s not always the easiest thing to do — unless you follow these expert tips, of course.