About rose-900
#8B0836 is rose-900, a tailwind v4. This page shows its rgb(139, 8, 54) / hsl(338.93, 89.12%, 28.82%) / oklch(0.4105 0.159 10.19) 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.