As an artist you never stop learning. You’re always trying new things, new colours. This is black. I almost never use black because, well, instructors have carried on the old mantra that originated with the Impressionists. It clued in that maybe they’ve never learned how to use black effectively either.
So, the only thing to do is to get to know the colours. Smear on some mass tone, scrap away to see the undertone. Mix it with white to see how it tints. Mix it with other colours to see how it shades. It’s how you get to know the colours.