I just recently bought the yellow correcter, which neutralizes any purple or blue undertones in the skin. The yellow correcter works well for me to hide my under eye circles since I have very light skin. After i blend a very thin layer of this into my under eye area I follow up with my MAC concealer and then set it with powder. I make sure to moisturize the area VERY well before I apply it since it can feel a little dry after I apply the powder.

Overall I am really happy with this product. It does what it says and I definitely recommend it :)