I went with the "Soft Black 20" shade and it did a really good job at covering up all the light brown tones in my hair. It was actually a bit toooooo dark, so if you're looking to go black, but not too dark I would suggest maybe going with a dark brown shade instead. Good news is, that after more than 4 washes later there are no signs of the brown shades coming back. Let's hope it stays this way. Oh, and it probably took about 3 washes to get the hair dye smell out. My hubby though is wishing that the light hair comes back since he personally likes the lighter hair on me... What is it with men and lighter hair, ugh! don't you guys know it's a lot of work to maintain. Anywho, I am kinda diggin' the natural look and will probably keep it around for a while.
Ps. Here is a picture I posted a couple of days ago where you can see the new hair color.