I was given Eye Coloration N 04 when I had my eyeliner touched up, and they applied it too. I was told the trick is to apply it so that it doesn't overlap with the eyeliner. 04 is very sheer when worn with just the eyeliner and mascara, so it doesn't feel like you're wearing any makeup, which is great. Layering it up gives it a lot of color, so it's fun. However, it comes off easily when wiped with tissue, so it might not be suitable for hot days. It can also be used on the under-eye bags, and it's easy to apply, so I hope it becomes a standard product rather than a limited edition. The container is the same as the Lunasol eyeliner, so I wish they would just change that.