Perfect black would be the inability for any light at all to reflect off the surface. A black hole is black because light cannot escape the gravitational pull.
Black appear black from a projector because the projector is not projecting any light at that spot.
In the "colors of light", or light emissions system, black is the absence of color, while white...
it means if your black you wont turn white no matter how much you you want to be white sorry buddy out of luck your black deal with it - To whoever wrote that, that is to some people like me, racist....