About slate-950
#020618 is slate-950, a tailwind v4. This page shows its rgb(2, 6, 24) / hsl(229.09, 84.62%, 5.1%) / oklch(0.1298 0.0425 265.13) 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.