To find the right foundation, test dabs foundation on a clean face in an area on which no foundation has been applied previously. A few different shades should be applied on different spots of the cheeks or jaw lines. The shade that blends in the best is the right shade for the complexion.
Artificial light is unreliable, so the results of foundation tests should always be viewed in natural day light. When choosing the right shade of foundation, it is very important to remember that the shade should be as close as possible to the color of the skin. People with pale skin shouldn't use foundation with pink tones. Beige tones are best for that skin tone. If the right shade can't be found, the darker option should always be chosen, never the lighter one, because it can seem very unnatural. Foundation should not be bought without testing it on the skin.
Skin type is also very important. If the skin is dry, creamy liquid or stick foundation should be used. If the skin is oily, oil-free liquid foundation or powder foundation is the best option. If the skin is a combination of oily and dry, good options are cream to powder bases or the more powdery bases. For more mature skin, the best options are formulas that contain labels like poreless, strike free or similar.