I few years ago I used to consistently dye my hair brown, since I have dark blonde (with bleached highlights) hair I found that brown would never really stay vibrant enough on my hair, especially on the parts which were previously bleached, these sections would definitely wash out a lot quicker. I used to use this product once every week or two to keep my hair a nice vibrant brown tone, it worked very well. Definitely helps extend the life of your colour & a lot better for your hair that constantly dying it