Have dark hair but i just want to make the color richer. Whats a good brand/color name?

I'm lookin for something you can buy at the drug store or Sally's. My hair is naturally dark brown but it want it really rich dark brown but NOT black. Think Kim Kardashian or Kristin Davis. I'm not trying to look Goth. I've been using the Garnier 100% color in the darkest brown, but I feel like it fades really fast and could be richer.