You can use a white foundation mixer and blue foundation mixer to brighten the foundation shade, or use yellow and orange to deepen the foundation shade, with a variety of colors to suit your different needs. Foundation adjusters can be used for color correction or mixed with Foundation to achieve a more precise match. Easy to use, lightweight and smooth. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.