Remember the color wheel?
For instance, pink and green.
But what about yellow?

What is yellow concealer for, and how do you use it properly?
Now, you want to apply it a little differently from your usual foundation.
This will help concentrate the concealer exactly where it’s needed.

Then you’ve got the option to follow up by covering with your usual skin-tone foundation.
Now you’re ready to kiss those hard-to-cover blue and purple imperfections goodbye.