About orange-400
#FF8B1F is orange-400, a tailwind v4. This page shows its rgb(255, 139, 31) / hsl(28.93, 100%, 56.08%) / oklch(0.7497 0.1753 55.84) 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.