A great question!
The last thing any girl wants is foundation in the wrong colour. To test if a foundation is the correct colour, you have to match it to your neck and not your face. Simply apply a dab of the foundation on your jaw line, two-finger spaces away from the earlobe, and blend up onto your face and down onto your neck. The colour should blend in perfectly with your neck; this will ensure that your foundation is the best shade for you. If the difference in colour is visible on either your face or neck, you need to try a lighter or darker shade.
Applying your foundation in natural light will ensure that the colour and density remain the same in all different types of light settings. When applying, sit facing a window, this will give you a natural and light coverage. Flawless Foundation made easy!