About zinc-400
#9F9FA9 is zinc-400, a tailwind v4. This page shows its rgb(159, 159, 169) / hsl(240, 5.49%, 64.31%) / oklch(0.7057 0.0144 286.02) 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.