brown

Q: I am 22 years old and my hair is turning grey. Can I use garnier hair color? I know we should not use black colour to hide our so can I use brown hair colour and not the black one? 

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:

1. At the end of my haidh, I wait until I see white and then do my ghusal. Sometimes after I have seen white and performed my ghusal I see brown again, will this be part of tuhr or haidh and will I have to perform ghusal again?

Q: Is it permissible to use dark brown hair colour or brown henna for hair?