About zinc-950
#09090B is zinc-950, a tailwind v4. This page shows its rgb(9, 9, 11) / hsl(240, 10%, 3.92%) / oklch(0.1408 0.0044 285.82) values, WCAG contrast against black and white, an OKLCH tint-and-shade ramp, and complementary, analogous, and triadic harmonies — all computed in perceptually-uniform OKLCH.