dye

A dye is a substance used to change the color of something.

You probably know that clothes can get dirty or old-looking. That's when people use dyes to restore their bright colors. But it's not only fabrics that dyes are for – they're also used in food, like jelly beans or candy, to make them colorful and fun to eat. If you want a certain shade of blue for your car paint job, the store would sell you a special dye just for that color. Dyes can be found in many forms, including liquid, powder, or even sticks (like markers).