Rum’s darker side is perhaps the most direct expression of its most used raw material: molasses. In particular, the rich and mellow Demerara style developed in Guyana has historically been the black, sweet base for most of the Navy rums which enjoyed huge popularity for much of the 20th century.
The pre-eminent cocktail dark rum, Myer's has retained its original bottle shape and tagline, 'World Famous, Dark and Mellow' for several decades. Found in good bars the world over.