Black=Negativity?

        Why is it considered that black colour spreads negativity? The boards in school are black. Stars which you enjoy looking at shine only because the sky is black. APJ Kalam said,"Black colour is sentimentally bad but every board makes the students life bright"
           Black cat is bad luck. Black people are ugly. Why so? Because you aren't black? We aren't allowed to wear black dresses on auspicious occasions because they say gods don't like "black". There are so many gods and goddesses who are black!(Kali Maa)
            Who are we to decide black is bad? Who are we to decide black is ugly? When we can worship black gods can't we at least respect black people?
                 BLACK IS BEAUTIFUL.
                   BLACK IS SEXY.