Hair dye that you can do well on your own

Hair salon prices are too expensive, so I usually dye my hair at home, but there are some products that are difficult to use alone. Since I have to do it by myself, I searched online and found a product that you just mix with water and dye your hair by brushing it through. It isn't a vibrant color, but it makes covering gray hair easy, which I like. The ingredients seem decent as well, so I am satisfied.