Nothing like you imagine

I purchased "Light Chestnut Brown" which turned out almost black. Stayed dark for about one week then changed into actually chestnut brown and by now, after 3 weeks, it seems to be completely faded. It did cover my few white hair. I also bought the product in believe it would be without harmful chemicals and first thing that jumped into my eye when I read through the description was the warning of p-Phenylenediamine.