I bought No. 4 because I thought yellow would be good for my severe purple-ish dark circles. I use Laura Mercier concealer on top of it, and it becomes brighter and less noticeable, and when I put a matte highlighter on top of it, it becomes even less noticeable, which was good. After the day, it becomes more noticeable and I have to touch it up, but it's better to use it than not to use it.