There are two artists with the name Black Harmony. 1)
a vocal group of 3 female artists formed in 1978. They recorded a number of songs which made it to the British reggae charts such as Don't Let It Go to Your Head. This track was also featured in the Reggae radio station K-JAH Radio West from the popular videogame Grand Theft Auto San Andreas. 2)
a black metal band from Ukraine playing Atmospheric Black Metal/Dark Ambient

Read more about Black Harmony on Last.fm.