Below: I felt like it needed something, so I topped it with one coat of Revlon's Rio Cool.
Today I have some messy swatches that I did very quickly between weeding and trimming in the yard (that sounds like a good excuse!). RDD is a dark brown creme, described as a 'rich blackened brown'. I'm calling it a creme because the shimmer really doesn't show up on the nail. It's darker than a chocolate brown, with a hint of charcoal, more than black. The pictures show 2 coats and I can see a spot or two which make me think that it could have used a third coat. I wouldn't say that this shade is anything out of the ordinary, although I don't really see anything in my browns that look terribly close to it. I used an older Revlon shade (Rio Cool) as a top coat in the last pictures, and I think I like RDD a little better this way.