There are so many brands of concealer. It is hard to find your right color because most of them look alike until you use them. It just takes time and patience. I use La girl pro concealer because it is thick and covers everything. When I tell you it is amazing, I am not lying. I also us Bh cosmetics Concealer. Their concealer is crazy good. It also covers everything.
When finding your color, you have to match to your skin tone but get one that is a little lighter than your skin color. The reason is that it gives you a pretty under eye look. Foundation and concealer are two different things.