Bests & Worsts Reviews from Amazon

BL-11 has no blue to it. It's a pretty flat black. It faded to a very dark brown before my roots started to show. "Meh" summed this one up for me. Like eating a cold cheese sandwich (not because you craved it or like it, but just because it satisfied your hunger). BL-22 is a shinier black, but still no blue. At least the shiny makes it less "meh". Like having a grilled cheese sammich vs that cold one. BL-21 has a more noticeable blue tone to it, and some shine. If you want a blue sheen that won't get you fired or make people think you're an anime character, stick with this one. I've used it many, many times. I got good coverage from all of them initially and they did cover my grey. I use Garnier's shampoo and conditioner for color treated hair. All three have been gentler on my hair and scalp than Vidal Sassoon (I LOVE their blue black, but my scalp doesn't), and both Garnier and VD's lasted longer on my stubborn grey than Feria.