The Tin My Brows Gel is my new favourite product. Not only does the end result actually look good but you can peel it off!

When you first apply it, the color might make you a bit nervous since it is quite dark (or course that varies from person to person) but expect to look slightly ridiculous for a minimum of two hours. The longer you wear it, the darker your brows will be when you peel 'em.  I have left it on overnight and it turned out to be a bit too long (you can easily tone it down by wiping it a bit with soap and water).  After using it, avoid any cleaning product on the brows for at least 24 hours.

I ordered the Brown and haven't had any problems with any orangey looking brows but I have heard that it happening for some people (I think with the grey brown but your mileage may vary).

If you don't like filling in your brows every day and/or enjoy peeling things, I really recommend this.