'Chocolate Coffee Bean' by Nubar is very dark brown with purple flecks. The purple flecks only show up in strong light but do add to the look. The polish looks almost black unless seen in bright light.
I decided to have another go at some nail art. The above photo shows both 'Chocolate Coffee Bean' and '24K' by Nubar. The line looks straighter/smoother in real life, thank goodness. I love '24K' it is a lovely gold shade.