Vermilion is a bright red color that can be used to paint or dye things. Imagine you have a really big box of crayons, and you pick out the brightest red one. That's what vermilion looks like. It's a very pretty color that can be used to make things look really fancy. People have been using vermilion for a very long time, even thousands of years ago! They would make it from minerals and use it to color things like clothing or even their homes. Some famous artists like Vincent van Gogh have used vermilion in their paintings too! So if you ever see something that is bright red and looks really fancy, there's a good chance it's colored with vermilion!