Black is a colour because it contains pigment. If something contains colouring matter, it is a colour. If black wasn't a colour, an devoid of pigment, black hair wouldn't turn grey or white, because the hair would already be devoid of pigment.
everythin is black when theres is no light bein absorbed.....what colour does green appear in a room lit with purely red light...the answer is black......get the drift....i like blcak...or grey.....