I saw someone dying eggs with natural ingredients on television and I wanted to try it. Then through a happy coincidence I got my hands on a whole bag full of onion skins my local greengrocer was about to throw out. So I made this but also added a cup of red wine vinegar to the pot. It worked very well and the eggs had a rich red-brown colour. I took one to show the greengrocer afterwards and he couldn't believe the eggs had such an intense colour just from the onions. I recommend this if you dye eggs at Easter as it is much healthier than the dyes sold in the shops.
Tried this this year and its very easy and effective.
I'm glad that somebody else does this too! Thats how we always do them at home for russian orthodox easter. Try red onion skins too.