Well not at all, and I think it's the farthest thing from blackface. But as I said, I feel people take issue with just the mere act of applying black makeup.
The carnival of blacks and whites (Carnaval de blancos y negros) happens in the southern part of Colombia, and its the result of many, many different traditions and syncretisms, from native american celebrations to the moon to celebrations from african slaves to the obvious european influences of carnaval itself. It lasts around a week, but the main important days are the blacks day and the whites day.
It's supposed to be a "game", people roam the streets to try to "paint" as many people as possible with black cosmetics, while screaming "vivan los negros!", there are also parades, floats, etc, etc, needless to say most people pretty much end up completely painted in black.
White's day is kind of the opposite, except that this time its flour and foam, with the main parade with giant floats, people scream "vivan los blancos" (I know, equal opportunity and all

).
That last one there? it's the freaking
president of the country. No one is spared.