If you, like me, have bleached your hair at home and turned yellow/orange like a little chick baby, then this product is the solution to the problem! See before and after picture.
I have typical Finnish hair, a bit gray too. Shade 5.35 Brownie gives me a nice warm brown color. The shade doesn't turn out as dark as the packaging color model suggests, but it's close enough to my goal. The gray doesn't solely cause that lighter result, as I still have so little of it.
The color holds well for me, fading a bit after about 6 weeks, like such colors generally do.