Onyx

Onyx feels like the shadow under a streetlight on wet pavement: dark enough to anchor the layout, but not as absolute as the near-black end of the gray range. Compared to Deepest Nightmare, it holds a touch more warmth and looks less "cold pencil." And unlike Black Panther, it doesn't press forward quite so hard. Batch Brew sits a little more lived-in and brown-dry, but Onyx stays cleaner, more even, and more neutral.

I use Onyx when you want a dark surface that won't steal attention from data or type. It's a solid base for data-heavy dashboards and admin panels, ticketing systems, and product tables where borders, dividers, and charts need contrast without turning the UI harsh. In dark mode UIs, it gives you structure without the glare you get from the darkest grays.

Pair it with cool-to-neutral text and crisp light grays. If you throw in lots of warm browns like you would with Batch Brew, Onyx can start to look slightly sooty instead of steady.