Hersh, Eitan; Royden, Laura (25 June 2022). “Antisemitic Attitudes Across the Ideological Spectrum” Political Research Quarterly.
doi:10.1177/10659129221111081
Black is the absence of light and therefore not a colour.
But it is a shade.
Pigments dude…
Black is every single color at once in pigment.
White is every single color at once in light.
Well you contradict yourself, since there’s no such thing as purple light, it must be as much a colour as black is. Have you considered your third-grade gotcha might not be quite nuanced enough for the real world? Or that the science of colours might be a little more complex than you first thought?