Oil

Oil looks like the moment a dark UI background stops being gray and starts behaving like a screen coating. It's cool and slightly muted, but it doesn't feel heavy like Black Olive, and it doesn't drift toward green like Deep Forest. Compared with Bitter Liquorice, it keeps a touch more daylight in the mix, so it reads as gray under scrutiny, not an almost-true black.

I use Oil for dark mode interfaces where you want content to stay crisp and self-contained. Think fintech product shells, streaming editors' timeline surrounds, and long-form reading screens that need glare control without going full void. It also works well in data-heavy dashboards, especially when you're relying on bright badges and light typography for hierarchy.

Pair it with clean, high-chroma accents, and don't expect it to play nicely with other equally dark surfaces. Next to warmer grays, it can feel more sterile than you intended.