About indigo-950
#1E1A4D is indigo-950, a tailwind v4. This page shows its rgb(30, 26, 77) / hsl(244.71, 49.51%, 20.2%) / oklch(0.2571 0.0908 281.44) 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.