We've all succumbed to trends that don't suit us, and this extends to makeup. But not every colour suits every skin tone. One person's perfect red lipstick may wash out the next person to try it. Deep black liner under the eyes may look sexy and sultry on a brunette and '90s emo on a blonde.
Finding out your skin's undertone is the first step to choosing colours to suit. If you're a lucky neutral, you may be able to pull off most things, but the rest of us will need to adapt. That doesn't mean you shouldn't experiment, but don't wear something you know washes you out just because it's popular.
When it comes to choosing the wrong colours, one place many of us go wrong is with our foundation. Testing it on your hand is not enough; you need to see how it looks in natural light on your face. Don't be shy about trying it on your jawline, then walking toward a window or doorway for the full effect. And remember, you may need one shade for Winter and one for Summer if you tan, though you may be able to use The Body Shop's Shade Adjusting Drops (£10) to gently lighten or darken as necessary.