Divinites and elements
Banishing of the negativity, dark moon, …
Where white candle contains all the energies and colors, black is it’s opposite. It absords everything and does not have any colors. In spells black is used precisely to absorb energy and spirits, to recieve because it receive different energies very efficently unlike white which acts as a protecting wall.
This is reason why black is popular color in spells, items and things.