How does that almay smart shade makeup work?

i dunno if thats exactly what it's called, but its the one that starts out white, then changes to match your skin colour. yeah, so how does it work? anyone know?How does that almay smart shade makeup work?
Haven't tried it, but I did find this:





';With Smart Shade, there鈥檚 no more guessing or stressing over what shade of makeup is right for you. This revolutionary colorless foundation contains microscopic color beads that are activated when you smooth it on鈥攖ransforming into a shade that complements your skin tone. You鈥檒l get sheer coverage with a natural finish, so your skin looks smooth and even. Nourishing antioxidants like grapeseed, ginseng and gingko biloba help give skin a healthy glow. Each of the 3 shades cover a wide range of color. All you have to do is choose the one closest to your skin tone鈥攊t鈥檚 that easy!';





Choose one and let Smart Shade do the rest!


1. Choose Light, Light/Medium or Medium


2. Smooth on to activate the color beads


3. Get your ideal shade for beautiful, natural-looking skin.





hypoallergenic 鈥?oil free 鈥?won't clog pores 鈥?clinically, dermatologist and allergy tested





Try it! ;DHow does that almay smart shade makeup work?
it works by the warmth of your skin, i have it and i love it.
Almay tests on animals!