Foundation toners are meant to either wear alone, under your current foundation, or to use to blend with your current water based foundation to 'tweak' it a bit to make it the perfect color for you!
The White adds sheer paleness to your skin, the rose balances olive skin (can also be used on sallow skin to add some sheer rosiness), the mint balances out redness, and the lavender neutralizes yellow tones and adds an elegant cool toned tone to your skin. To add paleness it seems to be a tossup based on personal preference between Lavender and White.
All can be worn under, over, or can replace your normal foundation. You can also experiment with adding it to your current foundation (as long as it's water-based, as this will not properly mix with a oil based foundation)
Ingredients Purified Water, Titanium Dioxide, Propylene Glycol Monostearate, Dimethicone, Kaolin, Veegum, Stearic Acid, Cetyl Alcohol, TEA, Lecithin, Cellulose Gum, Isostearamide DEA , Methylparaben, Propylparaben. May Contain: Iron Oxides. Fragrance Free.