Yellow onion skin is a natural way to create orange dye for your textile and craft projects by using your kitchen waste. Start collecting skins when you use onion in your cooking instead of throwing them away. If you don't cook with onions, no problem! The produce department in your local grocery store will happily give you their skins if you ask for them. This tutorial will show you how to brew dye from the skins, as well as the resulting color swatch samples (cotton) with various mordants.