Dye and Mehndi

Q: Is hair or beard dyeing permissible only for job purposes which is advised by an employer? It is a customer service sales job. The employer advised me to colour my hair and beard black to show that I am younger because markets like young energetic people. It is a garments label industry. Here, colouring the hair or beard black (to show that I am young) will not cheat people. It is only to show that the company has appointed smart officials. There is no cheating in the product. Product quality will remain ok as per company policy. I need a ruling in this regard.

Q: I am 47 years old and head hairs are almost white. Can I use hair colour? Please guide.

Q: I have heard it's permissible to use black dye, but I have a doubt. Nowadays we can't say what all the ingredients in the packets are. Is all type of dyes allowed?I have heard that our wudhu and bathing won't be correct since its a kind of paint. Often the hair colouring damages our hair. Knowing about such (scientific) damages, does Islam say "no" to use such types of dye.

Q: Is it permissible to dye ones hair with chocolate, onions, aaloo, coffee, etc?

Q: Can a Muslim use hair dye/hair colour/black Hena-Mehndi without Ammonia/chemical? Is it permitted?

Q: Can hair dye be applied in the state of janabat?

Q:

1. Can we use hair colour dye and can we offer namaz.

2. What does shariyat say about colour dye and which colours can we use?

Q: Is it permissible to use hair dyes available in market in various shades? What are the instructions in Sharia regarding dying of hair? Please provide full details.

Q: I have a hair dye, but I don't know whether the hair dye is porous or not. Please tell me how to know whether a hair dye is porous or not?

Q: I wanted to color my hair to brown, is it permissible to do so? I read on islamqa.info that it is permissible, but is it really the case?