2. Yellow Will Cover up Bruises and Undereye Circles
Once, when I was working as a waitress, I got hit in the side of the head with a food tray.
Long story, but the result was a nasty bruise on my temple.
A yellow concealer can eliminate the visibility by cancelling out the purplish tinge.
You can also use a yellow concealer to get rid of dark circles under your eyes and veins that are prominent.