About indigo-100
#E0E7FF is indigo-100, a tailwind v4. This page shows its rgb(224, 231, 255) / hsl(226.45, 99.86%, 93.92%) / oklch(0.9299 0.0334 272.79) 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.