When applying makeup, you always need to take into consideration the amount of light you will be exposed to. The more light that will be in your environment, the more subtle your makeup needs to be or else you will end up looking overdressed. Day makeup needs to be subtle and balanced. Neutral shades work best because they are subtle yet still define and enhance your features. If you have a feature you would like to focus on, you can wear colours that are a little bolder. Just remember not to overdo it. For example, black eyeliner is a great way to enhance your eyes, as long as you apply it with a light touch and keep the rest of our eye makeup more subtle. If the line is too thick or too dark, natural sunlight of florescent lights will make your eye makeup look thick and artificial.