About olive-900
#1D1D16 is olive-900, a tailwind v4. This page shows its rgb(29, 29, 22) / hsl(60, 13.73%, 10%) / oklch(0.2282 0.013 107.39) 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.