Rmk Super Basic Liquid Concealer perfectly covers dark circles, and easily blended with my foundation. I think it's one of the most natural liquid concealers. Especially if you are using RMK foundation, it would be always good to use the same product line. They definitely works better than mix with others. However, the colour is somehow too natural. I got the lightest colour , but still it's not so light. It matches with foundation perfectly, but I couldn't use it for highlighting.