Bigen Hair dye

So I have super dark brown hair almost black and I like to dye my hair blue black but my hair fades quickly. So fustrating....So I was at Sally's and I found this Japanese hair dye powder that only requires water!!! Yes water!!! I also researched reviews and lots of ladies said this is really good for hard to dye grey hair and also doesn't fade like traditional dyes. So I tried it and Wow! Super black...I recommend it oh plus it doesn't stain your walls LOL.