The Dark Browns on my ring and little finger are also surprisingly aesthetically pleasing. I think they are a cooler take on the Chanel-Rogue-Noir type of look. The e.l.f. fellow is slightly warmer, while the Rimmel is almost a black-brown. Like black's slightly cooler but less successful little sister.
Then there is the truly Ugly Brown on my middle finger (perhaps no coincidence, as it is somewhat of a middle finger to the concept of pretty nail varnish). It's a slightly greeny-mustardy bile-ish brown. But sometimes I love these really ugly colours, particularly when paired with something really conventionally "pretty" in contrast, like shiny pinky lipstick or a really girly dress or something. It is a challenging colour, but I've been wearing nail varnish for about 15 years, and I'm ready for a challenge. I have always wanted to be an overachiever. People probably told James Joyce Ulysses was stupid, just like they'll tell you you're nails look ugly. Don't worry, they just don't understand.