Talk:Obsidian/@comment-37209390-20190127111019/@comment-5642360-20190201135042

Yes, that is the subtractive color mixing, which covers mostly pigments and filters. The opposite being the additive colors, which involve light and ends with white when all light colors of the visible spectrum come together.

Which is very poetic. Obsidian is the conglomeration of the "impurities" that gives light their color which is black since all the pigments absorb all wavelengths while White has no impurities (or she implies) and absorbs none of the light thus reflecting all. Obsidian has all (or at least the pigment) that absorbs all light while White had no pigments and reflects all light.