About purple-950
#3C0366 is purple-950, a tailwind v4. This page shows its rgb(60, 3, 102) / hsl(274.55, 94.29%, 20.59%) / oklch(0.2909 0.1487 302.99) 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.