To find the perfect foundation for your particular coloring, apply three suitable shades in strips across the cheek and jawbone. You are looking for the one that literally disappears into the skins. Your foundation should blend with the skin tone of the neck and not the face, as this is where it has to work down to. If you cannot find the correct color, custom-blended foundations are available. When you try a new shade, check it in natural light. You should always aim to apply your makeup in daylight, so if this is not going to be possible invest in a natural daylight bulb. When trying a new foundation, always wait fifteen minutes before reaching a decision as the oil on your skin and the air can conspire to darken the shade you have choosen.