Are there hair dyes that are not chemical but natural?

You can use vegetable dyes to color hair naturally. All of the bright pinks, Oranges, greens, blues, purples, reds, etc. that you see people dye their hair are all natural vegetable dyes. Vegetable dyes deposit color on top of, but do not alter the natural color of your hair. You can only darken your hair or change the tone of your hair with vegetable dyes, you can not lighten your hair this way. The "punk" colors are made by brands such as Manic Panic and Special Effects. If you are going for a more natural color, there are a few options. Henna is a red/orange pigment, cassia is a beige/blonde pigment, and indigo is a blue/black pigment. The three can be mixed in different quantities to create a number of very natural looking colors. If you choose to use henna, cassia, or indigo, please be careful. I suggest visiting www.hennaforhair.com for more information, pictures, and for where to buy good henna products. There are a lot of "henna" dyes out there that contain chemical dyes as well as henna, and are not very good for hair. I wish you luck!