It Base My newest base, It Base is formulated to appear as if you are not wearing a stitch of makeup. It Base is the perfect solution for those who are looking for a base to naturally and subtly mattify your skin tone and blend in with your unique coloring seamlessly. Formulated for normal to oily skin types, this formula is quintessentially simple and understatedly sexy. Totally weightless and fabulously flawless. For light to medium complexions with yellow and pink undertones.